[Federal Register Volume 60, Number 142 (Tuesday, July 25, 1995)]
[Proposed Rules]
[Pages 37966-37968]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-18184]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 95-CE-27-AD]
Airworthiness Directives; Jetstream Aircraft Limited HP137 Mk1,
Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: This document proposes to adopt a new airworthiness directive
(AD) that would apply to Jetstream Aircraft Limited (JAL) HP137 Mk1,
Jetstream series 200, and Jetstream Models 3101 and 3201 airplanes. The
proposed action would require inspecting (one-time) the threaded
portion of the aileron mounting spigots for cracks, replacing any
cracked spigots, and replacing the securing nut assemblies with newly
designed special nut assemblies and new split pins. The proposed action
is prompted by reports of cracked mounting spigots caused by stress
corrosion. The actions specified by the proposed AD are intended to
prevent damage to the aileron control systems, which if not detected
and corrected, could cause loss of lateral control and eventual loss of
control of the airplane.
DATES: Comments must be received on or before September 29, 1995.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Central Region, Office of the Assistant Chief
Counsel, Attention: Rules Docket No. 95-CE-27-AD, Room 1558, 601 E.
12th Street, Kansas City, Missouri 64106. Comments may be inspected at
this location between 8 a.m. and 4 p.m., Monday through Friday,
holidays excepted.
Service information that applies to the proposed AD may be obtained
from Jetstream Aircraft Limited, Prestwick International Airport,
Ayrshire, KA9 2RW, Scotland, telephone (44-292) 79888; facsimile (44-
292) 79703; or Jetstream Aircraft Inc., Librarian, P.O. Box 16029,
Dulles International Airport, Washington, D.C. 20041-6029; telephone
(703) 406-1161; facsimile (703) 406-1469. This information also may be
examined at the Rules Docket at the address above.
FOR FURTHER INFORMATION CONTACT: Mr. Raymond A. Stoer, Program Officer,
Brussels Aircraft Certification Office, FAA, Europe, Africa, and Middle
East
[[Page 37967]]
Office, c/o American Embassy, B-1000 Brussels, Belgium; telephone (322)
513.3830; facsimile (322) 230.6899; or Mr. Sam Lovell, Project Officer,
Small Airplane Directorate, Airplane Certification Service, FAA, 1201
Walnut, suite 900, Kansas City, Missouri 64105; telephone (816) 426-
6934; facsimile (816) 426-2169.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to participate in the making of the
proposed rule by submitting such written data, views, or arguments as
they may desire. Communications should identify the Rules Docket number
and be submitted in triplicate to the address specified above. All
communications received on or before the closing date for comments,
specified above, will be considered before taking action on the
proposed rule. The proposals contained in this notice may be changed in
light of the comments received.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the proposed rule. All
comments submitted will be available, both before and after the closing
date for comments, in the Rules Docket for examination by interested
persons. A report that summarizes each FAA-public contact concerned
with the substance of this proposal will be filed in the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments
submitted in response to this notice must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket No. 95-CE-27-AD.'' The postcard will be date stamped and
returned to the commenter.
Availability of NPRMs
Any person may obtain a copy of this NPRM by submitting a request
to the FAA, Central Region, Office of the Assistant Chief Counsel,
Attention: Rules Docket No. 95-CE-27-AD, Room 1558, 601 E. 12th Street,
Kansas City, Missouri 64106.
Discussion
The Civil Airworthiness Authority (CAA), which is the airworthiness
authority for the United Kingdom, recently notified the FAA that an
unsafe condition may exist on JAL HP137 Mk1, Jetstream series 200, and
Jetstream Models 3101 and 3201 airplanes. The CAA advises that damage
to the aileron mounting spigot could occur when removing the securing
nut assemblies during servicing. The damage is from stress corrosion
caused by a combination of the torque load required to align the split
pin holes and the dissimilar materials of the securing nuts and the
mounting spigots and could result in damage to the aileron control
system. Damage to the aileron control systems, if not detected and
corrected, could cause loss of lateral control and loss of control of
the airplane.
JAL has issued Jetstream Service Bulletin (SB) 57-JA 921140, which
incorporates the following pages and revision levels:
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Pages Revision level Date
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4, 5, 8, 9, 10, 12, 13, and 14.... Original Issue.. February 24, 1993.
1, 2, 3, 6, 7, and 11............. Revision 1...... February 3, 1994.
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This SB specifies procedures for inspecting the mounting spigots
using both visual and fluorescent dye penetrant methods, and replacing
the existing securing nut assemblies and split pins with newly designed
special nut assemblies, and new split pins.
In order to assure the continued airworthiness of these airplanes
in the United Kingdom, the CAA classified this service bulletin as
mandatory. The CAA classifying a service document as mandatory is the
same for airplanes registered in the United Kingdom as the FAA issuing
an AD for airplanes registered in the United States.
This airplane model is manufactured in the United Kingdom and is
type certificated for operation in the United States under the
provisions of section 21.29 of the Federal Aviation Regulations (14 CFR
21.29) and the applicable bilateral airworthiness agreement between the
United States and the United Kingdom. Pursuant to this bilateral
airworthiness agreement, the CAA has kept the FAA informed of the
situation described above.
The FAA has examined the findings of the CAA, reviewed all
available information, and determined that AD action is necessary for
products of this type design that are certificated for operation in the
United States.
Since an unsafe condition has been identified and is likely to
exist or develop in other JAL HP137 Mk1, Jetstream series 200, and
Jetstream Models 3101 and 3201 airplanes of the same type design, the
proposed AD would require inspecting (using both visual and fluorescent
dye penetrant methods) the mounting spigots for cracks; replacing any
cracked spigots; and replacing the securing nut assemblies with newly
designed special nut assemblies and new split pins to prevent future
damage to the spigots.
The FAA estimates that 160 airplanes in the U.S. registry would be
affected by the proposed AD, that it would take approximately 22 hours
per airplane to accomplish the proposed action, and that the average
labor rate is approximately $60 an hour. Parts will be provided by the
manufacturer at no cost to the owners/operators. Based on these
figures, the total cost impact of the proposed AD on U.S. operators is
estimated to be $211,200 or $1,320 per airplane. This figure is based
on the assumption that no owner/operators has accomplished the proposed
inspection and modification.
The compliance time of this AD is presented in calendar time
instead of hours time-in-service (TIS). The FAA has determined that a
calendar time compliance is the most desirable method because the
unsafe condition described by this AD is caused by stress corrosion.
Stress corrosion initiates as a result of airplane operation, but can
continue to develop regardless of whether the airplane is in service or
in storage. Therefore, to ensure that the above-referenced condition is
detected and corrected on all airplanes within a reasonable period of
time without inadvertently grounding any airplanes, a compliance
schedule based upon calendar time instead of hours TIS is required.
The regulations proposed herein would not have substantial direct
effects 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. Therefore, in
accordance with Executive Order 12612, it is determined that this
proposal would not have sufficient federalism implications to warrant
the preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this action (1) is
not a ``significant regulatory action'' under Executive Order 12866;
(2) is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979); and (3) if promulgated,
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. A copy of the draft regulatory evaluation
prepared for this action has been placed in the Rules Docket. A copy of
it may be obtained by contacting the Rules Docket at the location
provided under the caption ADDRESSES.
[[Page 37968]]
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration proposes to amend
part 39 of the Federal Aviation Regulations (14 CFR part 39) as
follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. App. 1354(a), 1421 and 1423; 49 U.S.C.
106(g); and 14 CFR 11.89.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by adding a new AD to read as follows:
Jetstream Aircraft Limited: Docket No. 95-CE-27-AD.
Applicability: HP137 Mk1, Jetstream Series 200, and Jetstream
Models 3101 and 3201 airplanes (all serial numbers), certificated in
any category.
Note 1: This AD applies to each airplane identified in the
preceding applicability provision, regardless of whether it has been
modified, altered, or repaired in the area subject to the
requirements of this AD. For airplanes that have been modified,
altered, or repaired so that the performance of the requirements of
this AD is affected, the owner/operator must use the authority
provided in paragraph (c) of this AD to request approval from the
FAA. This approval may address either no action, if the current
configuration eliminates the unsafe condition, or different actions
necessary to address the unsafe condition described in this AD. Such
a request should include an assessment of the effect of the changed
configuration on the unsafe condition addressed by this AD. In no
case does the presence of any modification, alteration, or repair
remove any airplane from the applicability of this AD.
Compliance: Required within the next 6 calendar months after the
effective date of this AD, unless already accomplished.
To prevent damage to the aileron control systems, accomplish the
following:
(a) Inspect the mounting spigots for cracks using both visual
and fluorescent dye penetrant methods in accordance with the
Accomplishment Instructions section of Jetstream Service Bulletin
(SB) 57-JA 921140, which incorporates the following pages and
revision levels:
------------------------------------------------------------------------
Pages Revision level Date
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4, 5, 8, 9, 10, 12, 13 and 14..... Original Issue.. February 24, 1993.
1, 2, 3, 6 7, and 11.............. Revision 1...... February 3, 1994.
------------------------------------------------------------------------
(1) Prior to further flight, replace any cracked spigots with
applicable parts specified in the Parts Table in paragraph 5 of the
Accomplishment Instructions section of Jetstream SB 57-JA 921140.
(2) Prior to further flight, replace the securing nut assemblies
and split pins with new special nut assemblies, (Part No. SL45022
(Qty. 2)), and new split pins (Part No. SP90-C8 and SP90-C6), in
accordance with the Accomplishment Instructions section of Jetstream
SB 57-JA 921140. This replacement is required regardless of the
results of the inspection required in paragraph (a) of this AD.
(b) Special flight permits may be issued in accordance with
sections 21.197 and 21.199 of the Federal Aviation Regulations (14
CFR 21.197 and 21.199) to operate the airplane to a location where
the requirements of this AD can be accomplished.
(c) An alternative method of compliance or adjustment of the
initial or repetitive compliance times that provides an equivalent
level of safety may be approved by the Manager, Brussels Aircraft
Certification Office, FAA, Europe, Africa, and Middle East Office,
c/o American Embassy, B-1000 Brussels, Belgium The request shall be
forwarded through an appropriate FAA Maintenance Inspector, who may
add comments and then send it to the Manager, Brussels Aircraft
Certification Office, FAA, Europe, Africa, and Middle East Office.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Brussels Aircraft Certification Office.
(d) All persons affected by this directive may obtain copies of
the document referred to herein upon request from Jetstream Aircraft
Limited, Prestwick International Airport, Ayrshire, KA9 2RW,
Scotland, telephone (44-292) 79888; facsimile (44-292) 79703; or
Jetstream Aircraft Inc., Librarian, P.O. Box 16029, Dulles
International Airport, Washington, D.C. 20041-6029; telephone (703)
406-1161; facsimile (703) 406-1469; or may examine this document at
the FAA, Central Region, Office of the Assistant Chief Counsel, Room
1558, 601 E. 12th Street, Kansas City, Missouri 64106.
Issued in Kansas City, Missouri, on July 18, 1995.
Henry A. Armstrong,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 95-18184 Filed 7-24-95; 8:45 am]
BILLING CODE 4910-13-U