[Federal Register Volume 78, Number 86 (Friday, May 3, 2013)]
[Rules and Regulations]
[Pages 25846-25853]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-10446]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 25
[Docket No. FAA-2013-0374; Special Conditions No. 25-488-SC]
Special Conditions: Airbus, Model A340-600 Series Airplanes;
Lower Deck Crew Rest Compartments
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final special condition; request for comments.
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SUMMARY: These special conditions are issued for the Airbus Model A340
series airplanes. These airplanes, as modified by Flight Structures,
Inc., will have a novel or unusual design feature associated with the
installation of lower deck crew rest (LDCR) compartments. The LDCR
compartment is novel in terms of part 25 in that it will be located
under the passenger cabin floor in the aft cargo compartment of Airbus
Model A340-200 series airplanes. The applicable airworthiness
regulations do not contain adequate or appropriate safety standards for
this design feature. These special conditions contain the additional
safety standards that the Administrator considers necessary to
establish a level of safety equivalent to that established by the
existing airworthiness standards.
DATES: The effective date of these special conditions is April 29,
2013. We must receive your comments by June 17, 2013.
ADDRESSES: Send comments identified by docket number FAA-2013-0374
using any of the following methods:
Federal eRegulations Portal: Go to http://www.regulations.gov/ and follow the online instructions for sending
your comments electronically.
Mail: Send comments to Docket Operations, M-30, U.S. Department of
Transportation (DOT), 1200 New Jersey
[[Page 25847]]
Avenue SE., Room W12-140, West Building Ground Floor, Washington, DC,
20590-0001.
Hand Delivery or Courier: Take comments to Docket Operations in
Room W12-140 of the West Building Ground Floor at 1200 New Jersey
Avenue SE., Washington, DC, between 8 a.m. and 5 p.m., Monday through
Friday, except Federal holidays.
Fax: Fax comments to Docket Operations at 202-493-2251.
Privacy: The FAA will post all comments it receives, without
change, to http://www.regulations.gov/, including any personal
information the commenter provides. Using the search function of the
docket Web site, anyone can find and read the electronic form of all
comments received into any FAA docket, including the name of the
individual sending the comment (or signing the comment for an
association, business, labor union, etc.). DOT's complete Privacy Act
Statement can be found in the Federal Register published on April 11,
2000 (65 FR 19477-19478), as well as at http://DocketsInfo.dot.gov/.
Docket: Background documents or comments received may be read at
http://www.regulations.gov/ at any time. Follow the online instructions
for accessing the docket or go to the Docket Operations in Room W12-140
of the West Building Ground Floor at 1200 New Jersey Avenue SE.,
Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Alan Sinclair, FAA, Airframe and Cabin
Safety Branch, ANM-115, Transport Airplane Directorate, Aircraft
Certification Service, 1601 Lind Avenue SW., Renton, Washington 98057-
3356; telephone 425-227-2194; facsimile 425-227-1149.
SUPPLEMENTARY INFORMATION: The FAA has determined that notice of, and
opportunity for prior public comment on, these special conditions are
impracticable because these procedures would significantly delay
issuance of the design approval and thus delivery of the affected
aircraft. In addition, the substance of these special conditions has
been subject to the public comment process in several prior instances
with no substantive comments received.
Comments Invited
We invite interested people to take part in this rulemaking by
sending written comments, data, or views. The most helpful comments
reference a specific portion of the special conditions, explain the
reason for any recommended change, and include supporting data. We will
consider all comments we receive by the closing date for comments. We
may change these special conditions based on the comments we receive.
Background
On July 21, 2011, Flight Structures, Inc., applied for a
supplemental type certificate to install a lower deck crew rest (LDCR)
compartment in Airbus Model A340-600 series airplanes. The LDCR is
located under the passenger cabin floor of Airbus Model A340-600 series
airplanes and installed in the aft portion of the airplane. Occupancy
for the LDCR compartment is limited to a maximum of seven (7)
occupants. There are seven approved berths able to withstand the
maximum flight loads when the LDCR compartment is at maximum capacity.
The LDCR will only be occupied in flight, i.e., not during taxi,
takeoff or landing. A smoke detection system, manual fire-fighting
system, oxygen system and occupant amenities are provided.
Additionally, a sink and vanity are located just inside the main access
door.
Main access to the LDCR compartment is gained via the fixed
staircase just outside of the LDCR access door. Secondary emergency
egress uses an existing emergency escape hatch which is located above
the aft left-hand bunk to provide access to the main deck. See Figure
1.
[GRAPHIC] [TIFF OMITTED] TR03MY13.032
[[Page 25848]]
Type Certification Basis
Under the provisions of Sec. 21.101, Flight Structures, Inc., must
show that the Airbus Model A340-600 series airplanes, as changed,
continue to meet the applicable provisions of the regulations
incorporated by reference in Type Certificate No. A43NM or the
applicable regulations in effect on the date of application for the
change. The regulations incorporated by reference in the type
certificate are commonly referred to as the ``original type
certification basis.'' The regulations incorporated by reference in
A43NM are as follows: 14 CFR part 25, as amended by Amendments 25-1
through 25-63; certain regulations at later Amendments 25-65, 25-66,
and 25-77; and Amendment 25-64 with exceptions. Refer to Type
Certificate Data Sheet A43NM, as applicable, for a complete description
of the certification basis for these models, including certain special
conditions that are not relevant to these proposed special conditions.
If the Administrator finds that the applicable airworthiness
regulations (i.e., 14 CFR part 25) do not contain adequate or
appropriate safety standards for the Airbus Model A340-600 series
airplanes because of a novel or unusual design feature, special
conditions are prescribed under the provisions of Sec. 21.16.
Special conditions are initially applicable to the model for which
they are issued. Should the applicant apply for a supplemental type
certificate to modify any other model included on the same type
certificate to incorporate the same novel or unusual design feature,
the special conditions would also apply to the other model.
In addition to the applicable airworthiness regulations and special
conditions, the Airbus Model A340-600 series airplanes must comply with
the fuel vent and exhaust emission requirements of 14 CFR part 34 and
the noise certification requirements of 14 CFR part 36.
The FAA issues special conditions, as defined in 14 CFR 11.19, in
accordance with Sec. 11.38, and they become part of the type-
certification basis under Sec. 21.101.
Novel or Unusual Design Features
The Airbus Model A340-600 series airplanes will incorporate the
following novel or unusual design features: LDCR compartments.
While the installation of LDCR compartments is not a new concept
for large transport category airplanes, each compartment design has
unique features by virtue of its design, location, and use on the
airplane. Crew rest compartments have been previously installed and
certificated on several Airbus airplane models (as well as those of
other manufacturers) in locations as varied as in the main passenger
seating area, in the overhead space above the main passenger cabin
seating area, and below the passenger cabin seating area within the
cargo compartment. The modification is evaluated with respect to the
interior and assessed in accordance with the certification basis of the
airplane. However, part 25 does not provide all of the requirements
necessary for safety in crew rest compartments. The LDCR compartment is
novel in terms of part 25 in that it will be located under the
passenger cabin floor in the aft cargo compartment of Airbus Model
A340-200 series airplanes. Further, these special conditions do not
negate the need to address other applicable part 25 regulations.
Due to the novel or unusual features associated with the
installation of this LDCR compartment, special conditions are
considered necessary to provide a level of safety equal to that
established by the airworthiness regulations incorporated by reference
in the type certificate.
Operational Evaluations and Approval
These special conditions outline requirements for LDCR compartment
design approvals (e.g., type design change or supplemental type
certificate) administered by the FAA's Aircraft Certification Service.
Prior to operational use of an LDCR compartment on U.S.-registered
aircraft, the FAA's Flight Standards Service must evaluate and approve
the ``basic suitability'' of the LDCR compartment for crew occupation.
Additionally, if an operator wishes to use an LDCR compartment as
sleeping quarters, the crew rest compartment must undergo an additional
evaluation and approval (Reference Sec. Sec. 121.485(a), 121.523(b),
and 135.269(b)(5)). Compliance with these special conditions does not
ensure that the applicant has demonstrated compliance with the
requirements of part 121 or part 135.
To obtain an operational evaluation, the type design holder must
contact the Aircraft Evaluation Group (AEG) in the Flight Standards
Service and request a basic suitability evaluation or a sleeping
quarters evaluation of their crew rest compartments. The results of
these evaluations should be documented in the Flight Standardization
Board Report Appendix. Individual operators may reference these
standardized evaluations in discussions with their FAA Principal
Operating Inspector as the basis for an operational approval, in lieu
of an on-site operational evaluation.
Any changes to the approved LDCR compartment configuration that
affect crew member emergency egress or any other procedures affecting
the safety of the occupying crew members and/or related training shall
require a re-evaluation and approval. The applicant for a crew rest
design change that affects egress, safety procedures, or training is
responsible for notifying the FAA's AEG that a new crew rest evaluation
is required.
Procedures must be developed to assure that a crew member entering
the LDCR compartment through the vestibule to fight a fire will examine
the vestibule and the lavatory areas for the source of the fire prior
to entering the remaining areas of the crew rest compartment. These
procedures are intended to ensure that the source of the fire is not
between the crew member and the primary exit. In the event a fire
source is not immediately self-evident to the firefighter, the
firefighter should check for potential fire sources at areas closest to
the primary exit first, then proceed to check areas in such a manner
that the fire source, when found, would not be between the firefighter
and the primary exit. Procedures describing methods to search the LDCRs
for fire source(s) must be transmitted to the operator for
incorporation into their training programs and appropriate operational
manuals.
Discussion
The FAA formulated the special conditions for the LDCR compartment
from previous requirements established for various airplanes. These
special conditions along with the original type certification basis
provide the regulatory requirements necessary for certification of this
modification. Other special conditions may be developed, as needed,
based on further FAA review and discussions with the applicant,
manufacturer, and civil aviation authorities.
Compliance with these proposed special conditions does not relieve
the applicant from the existing airplane certification basis
requirements. One particular area of concern is the smaller compartment
volume created in the lower deck area of the airplane as a result of
the crew rest installation. The applicant must comply with the
requirements of Sec. 25.365(e), (f), and (g) for each of these
compartments, including the crew rest compartment, as well as any other
airplane compartments whose decompression characteristics are affected
by the installation of the crew rest
[[Page 25849]]
compartment. Please note that compliance with Sec. 25.831 must also be
demonstrated for all phases of flight where occupants will be present.
The applicant should note that the FAA considers crew rest
compartment smoke or fire detection and fire suppression systems
(including airflow management features which prevent hazardous
quantities of smoke or fire extinguishing agent from entering any other
compartment occupied by crew members or passengers) complex in terms of
paragraph 6d of Advisory Circular (AC) 25.1309-1A, System Design and
Analysis, dated June 21, 1988. In addition, the FAA considers failure
of the crew rest compartment fire protection system (i.e., smoke or
fire detection and fire suppression systems) in conjunction with a crew
rest fire to be a catastrophic event. Based on the ``Depth of Analysis
Flowchart'' shown in Figure 2 of AC 25.1309-1A, the depth of analysis
should include both qualitative and quantitative assessments (reference
paragraphs 8d, 9, and 10 of AC 25.1309-1A). In addition, it should be
noted that flammable fluids, explosives, or other dangerous cargo are
prohibited from being carried in the crew rest areas.
The requirements to enable crew member(s) quick entry to the crew
rest compartment and to locate a fire source inherently places limits
on the amount of baggage that may be carried and the size of the crew
rest area. The FAA considers that the crew rest area must be limited to
the stowage of crew personal luggage and must not be used for the
stowage of cargo or passenger baggage. The design of such a system to
include cargo or passenger baggage would require additional
requirements to ensure safe operation.
The addition of galley equipment or a kitchenette incorporating a
heat source (e.g., cook tops, microwaves, coffee pots, etc.) other than
a conventional lavatory or kitchenette hot water heater within the LDCR
compartment may require further special conditions to be considered. A
hot water heater is acceptable without further special conditions
consideration.
For the reasons discussed above, these special conditions contain
the additional safety standards that the Administrator considers
necessary to establish a level of safety equivalent to that established
by the existing airworthiness standards.
Applicability
As discussed above, these special conditions are applicable to the
Airbus Model A340-600 series airplanes. Should Flight Structures, Inc.,
apply at a later date for a supplemental type certificate to modify any
other model included on Type Certificate No. A43NM to incorporate the
same novel or unusual design feature, the special conditions would
apply to that model as well.
Conclusion
This action affects only certain novel or unusual design features
on one model series of airplanes. It is not a rule of general
applicability and affects only the applicant who applied to the FAA for
approval of these features on the airplane.
The substance of these special conditions has been subjected to the
notice and comment period in several prior instances and has been
derived without substantive change from those previously issued. It is
unlikely that prior public comment would result in a significant change
from the substance contained herein. Therefore, the FAA has determined
that prior public notice and comment are unnecessary and impracticable,
and good cause exists for adopting these special conditions upon
issuance. The FAA is requesting comments to allow interested persons to
submit views that may not have been submitted in response to the prior
opportunities for comment described above.
List of Subjects in 14 CFR Part 25
Aircraft, Aviation safety, Reporting and recordkeeping
requirements.
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.
The Special Conditions
Accordingly, pursuant to the authority delegated to me by the
Administrator, the following special conditions are issued as part of
the type certification basis for Airbus Model A340-600 series airplanes
modified by Flight Structures, Inc.
1. Occupancy of the lower deck crew rest (LDCR) compartment is
limited to the total number of installed bunks and seats in that
compartment. There must be an approved seat or berth able to withstand
the maximum flight loads when occupied for each occupant permitted in
the LDCR compartment. The maximum occupancy is seven in the LDCR
compartment.
(a) Appropriate placards must be located inside and outside each
entrance to the LDCR compartment to indicate:
(1) The maximum number of occupants allowed,
(2) That occupancy is restricted to crew members who are trained in
the evacuation procedures for the LDCR compartment,
(3) That occupancy is prohibited during taxi, take-off, and
landing,
(4) That smoking is prohibited in the LDCR compartment, and
(5) That stowage in the crew rest compartment area is limited to
crew personal luggage. The stowage of cargo or passenger baggage is not
allowed.
(b) At least one ashtray must be on the inside and outside of any
entrance to the LDCR compartment.
(c) There must be a means to prevent passengers from entering the
LDCR compartment in the event of an emergency or when no flight
attendant is present.
(d) There must be a means for any door installed between the LDCR
compartment and passenger cabin to be capable of being quickly opened
from inside the compartment, even when crowding occurs at each side of
the door.
(e) For all doors installed, there must be a means to preclude
anyone from being trapped inside the LDCR compartment. If a locking
mechanism is installed, it must be capable of being unlocked from the
outside without the aid of special tools. The lock must not prevent
opening from the inside of the compartment at any time.
(f) The means of opening doors and hatches to the LDCR compartment
must be simple and obvious. In addition, doors or hatches that separate
the LDCR compartment from the main deck must not adversely affect
evacuation of occupants on the main deck (e.g., slowing evacuation by
encroaching into aisles) or cause injury to those occupants during
opening or while opened.
2. There must be at least two emergency evacuation routes, which
could be used by each occupant of the LDCR compartment to rapidly
evacuate to the main cabin. These evacuation routes must be able to be
closed from the main passenger cabin after evacuation. In addition--
(a) The routes must be located with sufficient separation within
the LDCR compartment to minimize the possibility of an event either
inside or outside of the crew rest compartment rendering both routes
inoperative.
(b) Compliance to the requirements of Special Condition No. 2(a)
may be shown by inspection or by analysis. Regardless which method is
used, the maximum acceptable exit separation is 60 feet measured
between exit openings.
3. Compliance by Inspection. A LDCR compartment in which the
evacuation
[[Page 25850]]
routes are located such that each occupant of the seats and berths has
an unobstructed route to at least one of the evacuation routes
regardless of the location of a fire would be acceptable by inspection.
A fire within a berth that only blocks the occupant of that berth from
exiting the berth need not be considered. Therefore, exits which are
located at absolute opposite ends (i.e., adjacent to opposite end
walls) of the crew rest would require no further review or analysis
with regard to exit separation.
4. Compliance by Analysis.
(a) Analysis must show the LDCR compartment configuration and
interior features provide for all occupants of the LDCR compartment to
escape the compartment in the event of a hazard inside or outside of
the compartment. Elements to consider in this evaluation are as
follows:
(1) Fire inside or outside the LDCR compartment considered
separately and the design elements used to reduce the available fuel
for the fire,
(2) Design elements to reduce the fire ignition sources in the LDCR
compartment,
(3) Distribution and quantity of emergency equipment within the
LDCR compartment,
(4) Structural failure or deformation of components that could
block access to the available evacuation routes (e.g., seats, folding
berths, contents of stowage compartments, etc.),
(5) An incapacitated person blocking the evacuation routes, and
(6) Any other foreseeable hazard not identified above that could
cause the evacuation routes to be compromised.
(b) Analysis must consider design features affecting access to the
evacuation routes. The design features that should be considered
include but are not limited to seat-back break-over, the elimination of
rigid structure that reduces access from one part of the compartment to
another, the elimination of items that are known to be the cause of
potential hazards, the availability of emergency equipment to address
fire hazards, the availability of communications equipment,
supplemental restraint devices to retain items of mass that could
hinder evacuation if broken loose and load path isolation between
components that contain the evacuation routes.
(c) Analysis of the fire threats should be used in determining the
placement of required fire extinguishers and protective breathing
equipment (PBE) and should take into consideration the possibility of
fire in any location in the LDCR compartment. The location and quantity
of PBE and fire extinguishers should allow occupants located in any
approved seats or berths access to the equipment necessary to fight a
fire in the LDCR compartment.
(d) The intent of this special condition is to provide sufficient
exit separation, therefore the exit separation analysis described above
should not be used to approve exits which have less physical separation
(measured between the centroid of each exit opening) than the minimums
prescribed below, unless compensating features are identified and
submitted to the FAA for evaluation and approval.
(e) For LDCR compartments with one exit located near the forward or
aft end of an LDCR compartment (as measured by having the centroid of
the exit opening within 20 percent of the forward or aft end of the
total LDCR compartment length) the exit separation should not be less
than 50 percent of the total LDCR compartment length.
(f) For LDCR compartments with neither required exit located near
the forward or aft end of the LDCR compartment (as measured by not
having the centroid of either exit opening within 20 percent of the
forward or aft end of the total LDCR compartment length) the exit
separation should not be less than 30 percent of the total LDCR
compartment length.
(1) The routes must be designed to minimize the possibility of
blockage, which might result from fire, mechanical or structural
failure, or persons standing below or against the escape route. One of
the two evacuation routes should not be located where, during times in
which occupancy is allowed, normal movement by passengers occurs (i.e.,
main aisle, cross aisle or galley complex) that would impede egress
from the LDCR compartment. If an evacuation route utilizes an area
where normal movement of passengers occurs, it must be demonstrated
that passengers would not impede egress to the main deck. If there is
low headroom at or near the evacuation route, provisions must be made
to prevent or to protect occupants (of the LDCR compartment) from head
injury. The use of evacuation routes must not be dependent on any
powered device. If a hatch is installed in an evacuation route, the
point at which the evacuation route terminates in the passenger cabin
should not be located where normal movement by passengers or crew
occurs (main aisle, cross aisle, passageway or galley complex). If such
a location cannot be avoided, special consideration must be taken to
ensure that the hatch or door can be opened when a person, the weight
of a ninety-fifth percentile male, is standing on the hatch or door.
(2) Emergency evacuation procedures, including the emergency
evacuation of an incapacitated occupant from the LDCR compartment, must
be established. The applicant must transmit all of these procedures to
the operator for incorporation into its training programs and
appropriate operational manuals.
(3) There must be a limitation in the Airplane Flight Manual or
other suitable means requiring that crew members be trained in the use
of evacuation routes.
5. There must be a means for the evacuation of an incapacitated
person (representative of a ninety-fifth percentile male) from the LDCR
compartment to the passenger cabin floor.
(a) The evacuation must be demonstrated for all evacuation routes.
A crew member (a total of one assistant within the LDCR compartment)
may provide assistance in the evacuation. Additional assistance may be
provided by up to three persons in the main passenger compartment.
These additional assistants must be standing on the floor while
providing assistance.
(b) For evacuation routes having stairways, the additional
assistants may ascend up to one half the elevation change from the main
deck to the LDCR compartment, or to the first landing, whichever is
lower.
6. The following signs and placards must be provided in the LDCR
compartment:
(a) At least one exit sign meeting the requirements of Sec.
25.812(b)(1)(i) must be located near each exit. One allowable exception
is utilization of a sign with reduced background area of no less than
5.3 square inches (excluding the letters), provided that it is
installed such that the material surrounding the exit sign is light in
color (e.g., white, cream, light beige). If the material surrounding
the exit sign is not light in color, a sign with a minimum of a one-
inch wide background border around the letters would also be
acceptable. Another allowable exception is a sign with a symbol that
the FAA has determined to be equivalent for use as an exit sign in an
LDCR compartment.
(b) An appropriate placard located near each exit defining the
location and the operating instructions for each evacuation route.
(c) Placards must be readable from a distance of 30 inches under
emergency lighting conditions.
(d) The exit handles and evacuation path operating instruction
placards must be illuminated to at least 160
[[Page 25851]]
microlamberts under emergency lighting conditions.
7. There must be a means in the event of failure of the aircraft's
main power system, or of the normal LDCR compartment lighting system,
for emergency illumination to be automatically provided for the LDCR
compartment.
(a) This emergency illumination must be independent of the main
lighting system.
(b) The sources of general cabin illumination may be common to both
the emergency and the main lighting systems if the power supply to the
emergency lighting system is independent of the power supply to the
main lighting system.
(c) The illumination level must be sufficient for the occupants of
the LDCR compartment to locate and move to the main passenger cabin
floor by means of each evacuation route.
(d) The illumination level must be sufficient, with the privacy
curtains in the closed position, for each occupant of the crew rest
compartment to locate a deployed oxygen mask.
8. There must be means for two-way voice communications between
crew members on the flight deck and occupants of the LDCR compartment.
There must also be two-way communications between the occupants of the
LDCR compartment and each flight attendant station in the passenger
cabin required to have a public address system microphone per Sec.
25.1423(g). In addition, the public address system must include
provisions to provide only the relevant information to the flight crew
members in the LDCR compartment (e.g., fire in flight, aircraft
depressurization, preparation of the compartment occupants for landing,
etc.).
9. There must be a means for manual activation of an aural
emergency alarm system, audible during normal and emergency conditions,
to enable crew members on the flight deck and at each pair of required
floor level emergency exits to alert occupants of the LDCR compartment
of an emergency situation. Use of a public address or crew interphone
system will be acceptable, provided an adequate means of
differentiating between normal and emergency communications is
incorporated. The system must be powered in flight, after the shutdown
or failure of all engines and auxiliary power units, for a period of at
least ten minutes.
10. There must be a means, readily detectable by seated or standing
occupants of the LDCR compartment to indicate when seat belts should be
fastened. In the event there are no seats, at least one means must be
provided to cover anticipated turbulence (e.g., sufficient handholds).
Seat-belt-type restraints must be provided for berths and must be
compatible for the sleeping attitude during cruise conditions. There
must be a placard on each berth requiring that seat belts must be
fastened when occupied. If compliance with any of the other
requirements of these special conditions is predicated on specific head
location, there must be a placard identifying the head position.
11. In lieu of the requirements specified in Sec. 25.1439(a) that
pertain to isolated compartments and to provide a level of safety
equivalent to that which is provided occupants of an isolated galley,
all of the following equipment must be provided in the LDCR
compartment:
(a) At least one approved hand-held fire extinguisher appropriate
for the kinds of fires likely to occur.
(b) Two PBE devices suitable for firefighting or one PBE for each
hand-held fire extinguisher, whichever is greater. All PBE devices must
approved to Technical Standard Order (TSO)-C116 or equivalent.
(c) One flashlight.
Note: Additional PBE and fire extinguishers in specific
locations, beyond the minimum numbers prescribed in Special
Condition No. 11 may be required as a result of the egress analysis
accomplished to satisfy Special Condition No. 2(a).
12. A smoke or fire detection system (or systems) must be provided
that monitors each occupiable area within the LDCR compartment,
including those areas partitioned by curtains. Flight tests must be
conducted to show compliance with this requirement. Each system (or
systems) must provide:
(a) A visual indication to the flightdeck within one minute after
the start of a fire;
(b) An aural warning in the LDCR compartment; and
(c) A warning in the main passenger cabin. This warning must be
readily detectable by a flight attendant, taking into consideration the
positioning of flight attendants throughout the main passenger
compartment during various phases of flight.
13. The LDCR compartment must be designed such that fires within
the compartment can be controlled without a crew member having to enter
the compartment, or the design of the access provisions must allow crew
members equipped for firefighting to have unrestricted access to the
compartment. The time for a crew member on the main deck to react to
the fire alarm, to don the firefighting equipment, and to gain access
must not exceed the time for the compartment to become smoke-filled,
making it difficult to locate the fire source. Procedures describing
methods to search the LDCR compartments for fire sources(s) must be
established. The applicant must transmit these procedures to the
operator for incorporation into their training programs and appropriate
operational manuals.
14. Fire and Smoke Extinguishing Equipment:
(a) A means must be provided to prevent hazardous quantities of
smoke or extinguishing agent originating in the LDCR compartment from
entering any other compartment occupied by crew members or passengers.
This means must include the time periods during the evacuation of the
LDCR compartment and, if applicable, when accessing the LDCR
compartment to manually fight a fire. Smoke entering any other
compartment occupied by crew members or passengers when the access to
the LDCR compartment is opened, during an emergency evacuation, must
dissipate within five minutes after the access to the LDCR compartment
is closed. Hazardous quantities of smoke may not enter any other
compartment occupied by crew members or passengers during subsequent
access to manually fight a fire in the LDCR compartment (the amount of
smoke entrained by a firefighter exiting the LDCR compartment through
the access is not considered hazardous). During the one-minute smoke
detection time, penetration of a small quantity of smoke from the LDCR
compartment into an occupied area is acceptable. Flight tests must be
conducted to show compliance with this requirement.
(b) There must be a provision in the firefighting procedures to
ensure that all door(s) and hatch(es) at the crew rest compartment
outlets are closed after evacuation of the crew rest compartment and
during firefighting to minimize smoke and extinguishing agent from
entering other occupiable compartments.
(c) If a built-in fire extinguishing system is used in lieu of
manual firefighting, then the fire extinguishing system must be
designed so that no hazardous quantities of extinguishing agent will
enter other compartments occupied by passengers or crew. The system
must have adequate capacity to suppress any fire occurring in the LDCR
compartment, considering the fire threat, volume of the compartment and
the ventilation rate.
15. There must be a supplemental oxygen system within the crew rest
[[Page 25852]]
compartment that provides the following:
(a) At least one mask for each seat and berth in the crew rest
compartment.
(b) If a destination area (such as a changing area) is provided in
the LDCR compartment, an oxygen mask must be readily available for each
occupant that can reasonably be expected to be in the destination area
(with the maximum number of required masks within the destination area
being limited to the placarded maximum occupancy of the crew rest).
(c) An oxygen mask must be readily accessible to each occupant who
can reasonably be expected to be moving from the main cabin into the
crew rest compartment, moving around within the crew rest compartment,
or moving from the crew rest compartment to the main cabin.
(d) The system must provide an aural and visual alert to warn the
occupants of the LDCR compartment to don oxygen masks in the event of
decompression. The aural and visual alerts must activate concurrently
with the deployment of the oxygen masks in the passenger cabin. To
compensate for sleeping occupants, the aural alert must be heard in
each section of the LDCR compartment and must sound continuously for a
minimum of five minutes or until a reset switch within the LDCR
compartment is activated. A visual alert that informs occupants that
they must don an oxygen mask must be visible in each section.
(e) There must also be a means by which the oxygen masks can be
manually deployed from the flight deck.
(f) Procedures for crew rest occupants in the event of
decompression must be established. These procedures must be transmitted
to the operator for incorporation into its training programs and
appropriate operational manuals.
(g) The supplemental oxygen system for the crew rest shall meet the
same 14 CFR part 25 regulations as the supplemental oxygen system for
the passenger cabin occupants except for the 10 percent additional
masks requirement of 14 CFR 25.1447(c)(1).
(h) The illumination level of the normal LDCR compartment lighting
system must automatically be sufficient for each occupant of the
compartment to locate a deployed oxygen mask.
16. The following requirements apply to LDCR compartments that are
divided into several sections by the installation of curtains or
partitions:
(a) A placard is required adjacent to each curtain that visually
divides or separates, for privacy purposes, the LDCR compartment into
small sections. The placard must require that the curtain(s) remains
open when the private section it creates is unoccupied. The vestibule
section adjacent to the stairway is not considered a private area and,
therefore, does not require a placard.
(b) For each section of the LDCR compartment created by the
installation of a curtain, the following requirements of these special
conditions must be met with the curtain open or closed:
(1) No smoking placard (Special Condition No. 1),
(2) Emergency illumination (Special Condition No. 7),
(3) Emergency alarm system (Special Condition No. 9),
(4) Seat belt fasten signal or return to seat signal as applicable
(Special Condition No. 10),
(5) The smoke or fire detection system (Special Condition No. 12),
and
(6) The oxygen system (Special Condition No. 15).
(c) Lower deck crew rest compartments visually divided to the
extent that evacuation could be affected must have exit signs that
direct occupants to the primary stairway exit. The exit signs must be
provided in each separate section of the LDCR compartment, except for
curtained bunks, and must meet the requirements of Sec.
25.812(b)(1)(i). An exit sign with reduced background area or a
symbolic exit sign as described in Special Condition No. 6(a) may be
used to meet this requirement.
(d) For sections within a LDCR compartment that are created by the
installation of a rigid partition with a door physically separating the
sections, the following requirements of these special conditions must
be met with the door open or closed:
(1) There must be a secondary evacuation route from each section to
the main deck, or alternatively, the applicant must show that any door
between the sections has been designed to preclude anyone from being
trapped inside the compartment. Removal of an incapacitated occupant
within this area must be considered. A secondary evacuation route from
a small room designed for only one occupant for short time duration,
such as a changing area or lavatory, is not required. However, removal
of an incapacitated occupant within a small room, such as a changing
area or lavatory, must be considered.
(2) Any door between the sections must be shown to be openable when
crowded against, even when crowding occurs at each side of the door.
(3) There may be no more than one door between any seat or berth
and the primary stairway exit.
(4) There must be exit signs in each section meeting the
requirements of Sec. 25.812(b)(1)(i), or shown to have an Equivalent
Level of Safety, that direct occupants to the primary stairway exit. An
exit sign with reduced background area or a symbolic exit sign as
described in Special Condition No. 6(a) may be used to meet this
requirement.
(e) For each smaller section within the main LDCR compartment
created by the installation of a partition with a door, the following
requirements of these special conditions must be met with the door open
or closed:
(1) No smoking placards (Special Condition No. 1);
(2) Emergency illumination (Special Condition No. 7);
(3) Two-way voice communication (Special Condition No. 8);
(4) Emergency alarm system (Special Condition No. 9);
(5) Seat belt fasten signal or return to seat signal as applicable
(Special Condition No. 10);
(6) Emergency firefighting and protective equipment (Special
Condition No. 11);
(7) Smoke or fire detection system (Special Condition No. 12), and
(8) The oxygen system (Special Condition No. 15).
17. The requirements of two-way voice communication with the flight
deck and provisions for emergency firefighting and protective equipment
are not applicable to lavatories or other small areas that are not
intended to be occupied for extended periods of time.
18. Where a waste disposal receptacle is fitted, it must be
equipped with an automatic fire extinguisher that meets the performance
requirements of Sec. 25.854(b).
19. Materials (including finishes or decorative surfaces applied to
the materials) must comply with the flammability requirements of Sec.
25.853(a) as amended by Amendment 25-116. Mattresses must comply with
the flammability requirements of Sec. 25.853(c), as amended by
Amendment 25-116.
20. The addition of a lavatory within the LDCR compartment would
require the lavatory to meet the same requirements as those for a
lavatory installed on the main deck except with regard to Special
Condition No. 12 for smoke detection.
21. Each stowage compartment in the crew rest compartment must be
completely enclosed. All enclosed stowage compartments within the LDCR
compartment that are not limited to stowage of emergency equipment or
airplane supplied equipment (i.e., bedding) must meet the design
criteria
[[Page 25853]]
given in the table below. Enclosed stowage compartments greater than
200 ft\3\ in interior volume are not addressed by this special
condition. The in flight accessibility of very large enclosed stowage
compartments and the subsequent impact on the crew members' ability to
effectively reach any part of the compartment with the contents of a
hand fire extinguisher will require additional fire protection
considerations similar to those required for inaccessible compartments
such as Class C cargo compartments.
----------------------------------------------------------------------------------------------------------------
Stowage compartment interior volumes
------------------------------------------------------------------------------
Fire protection features 25 cubic feet to less 57 cubic feet to 200
Less than 25 cubic feet than 57 cubic feet cubic feet
----------------------------------------------------------------------------------------------------------------
Materials of construction \1\.... Yes...................... Yes..................... Yes.
Detectors \2\.................... No....................... Yes..................... Yes.
Liner \3\........................ No....................... Yes..................... Yes.
Locating device \4\.............. No....................... Yes..................... Yes.
----------------------------------------------------------------------------------------------------------------
\1\ Material: The material used to construct each enclosed stowage compartment must at least be fire resistant
and must meet the flammability standards established for interior components (i.e., 14 CFR part 25 Appendix F,
parts I, IV, and V) per the requirements of Sec. 25.853. For compartments less than 25 ft\3\ in interior
volume, the design must ensure the ability to contain a fire likely to occur within the compartment under
normal use.
\2\ Detectors: Enclosed stowage compartments equal to or exceeding 25 ft\3\ in interior volume must be provided
with a smoke or fire detection system to ensure that a fire can be detected within a one-minute detection
time. Flight tests must be conducted to show compliance with this requirement. Each system (or systems) must
provide:
(a) A visual indication in the flight deck within one minute after the start of a fire,
(b) An aural warning in the LDCR compartment, and
(c) A warning in the main passenger cabin. This warning must be readily detectable by a flight attendant, taking
into consideration the positioning of flight attendants throughout the main passenger compartment during
various phases of flight.
\3\ Liner: If the material used to construct the stowage compartment can be shown to meet the flammability
requirements of a liner for a Class B cargo compartment (i.e., Sec. 25.855 at Amendment 25-116, and Appendix
F, part I, paragraph (a)(2)(ii)), then no liner would be required for enclosed stowage compartments equal to
or greater than 25 ft\3\ in interior volume but less than 57 ft\3\ in interior volume. For all enclosed
stowage compartments equal to or greater than 57 ft\3\ in interior volume but less than or equal to 200 ft\3\,
a liner must be provided that meets the requirements of Sec. 25.855 for a Class B cargo compartment.
\4\ Location Detector: Lower deck crew rest compartments which contain enclosed stowage compartments exceeding
25 ft\3\ interior volume and which are located away from one central location such as the entry to the LDCR
compartment or a common area within the LDCR compartment would require additional fire protection features and/
or devices to assist the firefighter in determining the location of a fire.
Issued in Renton, Washington, on April 29, 2013.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2013-10446 Filed 5-2-13; 8:45 am]
BILLING CODE 4910-13-P