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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1305; Project Identifier AD-2022-00913-T;
Amendment 39-22309; AD 2023-02-02]
RIN 2120-AA64
Airworthiness Directives; Gulfstream Aerospace Corporation
Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD)
for all
Gulfstream Aerospace Corporation (Gulfstream) Model GV and GV-SP
airplanes. This AD was prompted by the omission of a life limit in the
airworthiness limitations section (ALS) of the maintenance manual for
a
certain main landing gear (MLG) trunnion pin. This AD requires revising
the ALS of the existing instructions for continued airworthiness (ICA)
or inspection program for the airplane to establish a life limit for
the affected MLG trunnion pin. The FAA is issuing this AD to address
the unsafe condition on these products.
DATES: This AD is effective February 28, 2023.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2022-1305; or in person at Docket Operations between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD
docket contains this final rule, any comments received, and other
information. The address for Docket Operations is U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Miral Patel, Aerospace Engineer,
Systems and Equipment Section, FAA, Atlanta ACO Branch, 1701 Columbia
Avenue, College Park, GA 30337; phone: 404-474-5590; email: 9-ASO-
ATLACO-ADs@faa.gov.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all Gulfstream Model GV
and GV-SP airplanes. The NPRM published in the Federal Register on
October 27, 2022 (87 FR 65018). The NPRM was prompted by a report
indicating a life limit for replacing MLG trunnion pin part number (P/
N) 1159SCL566-17 had been omitted from the ALS of the maintenance
manual for Model GV and GV-SP airplanes. Gulfstream revised the ALS for
the applicable airplanes to establish a life limit of 20,000 flight
cycles for the affected MLG trunnion pin. A trunnion pin remaining in
service beyond its life limit could lead to fracture and failure of the
trunnion pin. This condition, if not addressed, could result in MLG
failure and could lead to a runway excursion.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the NPRM or on the determination of
the cost to the public.
Conclusion
The FAA reviewed the relevant data and determined that air safety
requires adopting this AD as proposed. Accordingly, the FAA is issuing
this AD to address the unsafe condition on these products. Except for
minor editorial changes, this AD is adopted as proposed in the NPRM.
None of the changes will increase the economic burden on any operator.
Other Related Service Information
The FAA reviewed Gulfstream GV Aircraft Maintenance Manual,
Revision 55, dated March 15, 2022; Gulfstream G550 Aircraft Maintenance
Manual, Revision 36, dated March 15, 2022; and Gulfstream G500-5000
Aircraft Maintenance Manual, Revision 36, dated March 15, 2022. The
service information adds a life limit for MLG trunnion pin P/N
1159SCL566-17.
Costs of Compliance
The FAA estimates that this AD affects 582 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs
|
Action
|
Labor cost
|
Parts cost
|
Cost/airplane
|
Cost on
U.S. operators
|
| Revise ALS |
1 work-hour x $85 = $85 |
N/A
|
$85
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$49,470
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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.
The FAA is 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
This AD will not have federalism implications under Executive Order
13132. This AD will 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 above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
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