[Federal Register Volume 78, Number 172 (Thursday, September 5, 2013)]
[Proposed Rules]
[Pages 54596-54598]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-21587]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2013-0751; Directorate Identifier 2012-SW-051-AD]
RIN 2120-AA64
Airworthiness Directives; AgustaWestland S.p.A. (Type Certificate
Formerly Held by Agusta S.p.A) (Agusta) Helicopters
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to supersede an existing airworthiness directive
(AD) for Agusta Model AB139 and AW139 helicopters. The existing AD
currently requires establishing a revised life limit for each tail
rotor blade (blade), updating the helicopter's historical records,
repetitively inspecting each blade for a crack, and replacing certain
blades. Since we issued that AD, the manufacturer has improved the
design of the blades using different materials and established life
limits for each newly-designed blade. This proposed AD would expand the
applicability to include the newly-designed blades and establish their
life limits. This proposed AD would also retain the requirement to
inspect each blade for a crack and, if there is a crack, replace each
blade with an airworthy blade. The proposed actions are intended to
detect a crack in a blade to prevent failure of a blade and subsequent
loss of control of the helicopter.
DATES: We must receive comments on this proposed AD by November 4,
2013.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your
comments electronically.
Fax: 202-493-2251.
Mail: Send comments to the U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590-0001.
Hand Delivery: Deliver to the ``Mail'' address between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the Docket Operations Office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the foreign
authority's AD, the economic evaluation, any comments received, and
other information. The street address for the Docket Operations Office
(telephone 800-647-5527) is in the ADDRESSES section. Comments will be
available in the AD docket shortly after receipt.
For service information identified in this proposed AD, contact
Agusta Westland, Customer Support & Services, Via Per Tornavento 15,
21019 Somma Lombardo (VA) Italy, ATTN: Giovanni Cecchelli; telephone
39-0331-711133; fax 39 0331 711180; or at http://www.agustawestland.com/technical-bullettins. You may review the
referenced service information at the FAA, Office of the Regional
Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth,
Texas 76137.
FOR FURTHER INFORMATION CONTACT: Sharon Miles, Aviation Safety
Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA,
2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222-5110;
email [email protected].
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to participate in this rulemaking by submitting
written comments, data, or views. We also invite comments relating to
the economic, environmental, energy, or federalism impacts that might
result from adopting the proposals in this document. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. To
ensure the docket does not contain duplicate comments, commenters
should send only one copy of written comments, or if comments are filed
electronically, commenters should submit only one time.
We will file in the docket all comments that we receive, as well as
a report summarizing each substantive public contact with FAA personnel
concerning this proposed rulemaking. Before acting on this proposal, we
will consider all comments we receive on or before the closing date for
comments. We will consider comments filed after the comment period has
closed if it is possible to do so without incurring expense or delay.
We may change this proposal in light of the comments we receive.
Discussion
On August 26, 2011, we issued Emergency AD (EAD) 2011-18-52 for the
Agusta Model AB139 and AW139 helicopters. We published EAD 2011-18-52
as a final rule; request for comments in the Federal Register (77 FR
23109, April 18, 2012). EAD 2011-18-52 requires revising the life
limits for each blade, part number (P/N) 3G6410A00131 and 4G6410A00131,
updating the helicopter's historical records, repetitively inspecting
each blade for a crack, and replacing certain blades. That action was
prompted by a fatal accident involving an Agusta Model AW139
helicopter, which may have been caused by cracks in a blade. The
European Aviation Safety Agency (EASA), which is the Technical Agent
for the Member States of the European Union, notified us of the unsafe
condition and issued EASA EAD No. 2011-0156-E, dated August 25, 2011,
to require repetitive inspections and reduce the life limit of the
blades. This condition, if not detected and corrected, could result in
failure of a blade and subsequent loss of control of the helicopter.
Actions Since Existing AD Was Issued
Since we issued EAD No. 2011-18-52, the manufacturer first
developed two new blades with an improved
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design and specified life limits and repetitive inspections for the
blades. EASA issued AD No. 2012-0030, dated February 17, 2012, which
superseded EASA EAD No. 2011-0156E, to add the new blades to the
required actions. The manufacturer then developed two new blades with
improved materials and specified new life limits and inspections for
the blades. EASA then issued EASA AD No. 2012-0076, dated May 2, 2012,
revised by EASA AD No. 2012-0076R1, dated July 13, 2012, to require the
repetitive inspections and reduced life limits on the additional new
blades.
FAA's Determination
These helicopters have been approved by the aviation authority of
Italy and are approved for operation in the United States. Pursuant to
our bilateral agreement with Italy, EASA, its technical representative,
has notified us of the unsafe condition described in its AD. We are
proposing this AD because we evaluated all known relevant information
and determined that an unsafe condition is likely to exist or develop
on other helicopters of these same type designs.
Related Service Information
Agusta issued Mandatory Bollettino Tecnicos (BTs) No. 139-265, No.
139-285, No. 139-286, all Revision A, and all dated July 12, 2012,
which specify a precautionary inspection for a crack, a life limit for
the affected blades, and a ``quarantine'' of blades that have exceeded
their life limit. The BTs also provide instructions for mixed usage of
the affected blades. The BTs specify sending the damaged or cracked
blade along with certain data to the manufacturer.
Proposed AD Requirements
This proposed AD would retain the inspection requirements for
certain part-numbered blades and expand the applicability to include
the newly-designed blades and establish life limits for those blades.
The proposed AD would also require replacing any cracked blade or a
blade that has reached its life limit.
Interim Action
We consider this proposed AD to be an interim action. If a final
action is later identified, we might consider additional rulemaking.
Costs of Compliance
We estimate that this proposed AD would affect 93 helicopters of
U.S. Registry. We estimate that operators may incur the following costs
in order to comply with this AD. It would take 1 work hour to inspect
each blade for a crack at $85 per work hour or $7,905 for the fleet. If
required, it would take 8 work hours to replace a blade, and required
parts would cost $35,680, for total cost of $36,360.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. ``Subtitle VII: Aviation
Programs,'' describes in more detail the scope of the Agency's
authority.
We are issuing this rulemaking under the authority described in
``Subtitle VII, Part A, Subpart III, Section 44701: General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed, I certify this proposed regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska to the extent that
it justifies making a regulatory distinction; and
4. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared an economic evaluation of the estimated costs to comply
with this proposed AD and placed it in the AD docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by removing Amendment 39-17020 (77 FR
23109, April 18, 2012); Docket No. FAA-2012-0409; Directorate
Identifier 2011-SW-055-AD; and by adding the following new
airworthiness directive (AD):
Agustawestland S.p.A. (Type Certificate Formerly Held by Augsta
S.p.A) (Agusta): Docket No. FAA-2013-0751; Directorate Identifier
2012-SW-051-AD.
(a) Applicability
This AD applies to Model AB139 and AW139 helicopters with tail
rotor blade (blade), part number (P/N) 3G6410A00131, 4G6410A00131,
3G6410A00132, 4G6410A00132, 3G6410A00133, or 4G6410A00133,
installed, certificated in any category.
(b) Unsafe Condition
This AD defines the unsafe condition as a crack in a blade. This
condition could result in failure of a blade and subsequent loss of
control of the helicopter.
(c) Affected ADs
This AD supersedes AD No. 2011-18-52; Amendment 39-17020; Docket
No. FAA-2012-0409; Directorate Identifier 2011-SW-055-AD.
(d) Comments Due Date
We must receive comments by November 4, 2013.
(e) Compliance
You are responsible for performing each action required by this
AD within the specified compliance time unless it has already been
accomplished prior to that time.
(f) Required Actions
(1) Within 5 hours time-in-service (TIS), establish a life limit
for each blade as follows, revise the Airworthiness Limitations
section of the maintenance manual, and update the helicopter's
historical records. If a blade's total number of cycles is unknown,
determine the blade cycles by multiplying the blade's hours TIS by
4.
(i) For blade, P/N 3G6410A00131 or P/N 4G6410A00131: establish a
life limit of 600 hours TIS or 1,500 cycles, whichever occurs first.
(ii) For blade, P/N 3G6410A00132 or P/N 4G6410A00132: establish
a life limit of 1,200 hours TIS or 3,200 cycles, whichever comes
first.
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(iii) For blade, P/N 3G6410A00133 or P/N 4G6410A00133: establish
a life limit of 10,000 cycles or 3 years since opening the sealed
wrap, whichever comes first.
(2) Within 5 hours TIS, replace each blade that has reached or
exceeded its life limit with an airworthy blade.
(3) Within 25 hours TIS, and thereafter at intervals not to
exceed 25 hours TIS, using a mirror, a 5x or higher power magnifying
glass, and a light source, or borescope, visually inspect each blade
for a crack or damage that exceeds the limits of the applicable
maintenance manual in the highlighted area depicted in Figure 1 of
Agusta Mandatory Bollettino Tecnicos No. 139-265, Revision A, dated
July 12, 2012; No. 139-285, Revision A, dated July 12, 2012; or No.
139-286, Revision A, dated July 12, 2012.
(4) If there is a crack, or if there is damage that exceeds the
limits of the applicable maintenance manual, before further flight,
replace the blade with an airworthy blade.
(g) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Safety Management Group, FAA, may approve AMOCs
for this AD. Send your proposal to: Sharon Miles, Aviation Safety
Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA,
2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222-
5110; email [email protected].
(2) For operations conducted under a 14 CFR part 119 operating
certificate or under 14 CFR part 91, subpart K, we suggest that you
notify your principal inspector, or lacking a principal inspector,
the manager of the local flight standards district office or
certificate holding district office before operating any aircraft
complying with this AD through an AMOC.
(h) Additional Information
The subject of this AD is addressed in European Aviation Safety
Agency (EASA) AD No. 2012-0076R1, dated July 13, 2012, which revises
EASA AD No. 2012-0076, dated May 2, 2012, which can be found in the
AD docket on the Internet at http://www.regulations.gov.
(i) Subject
Joint Aircraft Service Component (JASC) Code: 6410 Tail Rotor
Blades.
Issued in Fort Worth, Texas, on August 21, 2013.
Kim Smith,
Directorate Manager, Rotorcraft Directorate, Aircraft Certification
Service.
[FR Doc. 2013-21587 Filed 9-4-13; 8:45 am]
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