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Federal Register / Vol. 86, No. 235 / Friday, December 10, 2021 / Rules and Regulations DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39

Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call 817 2225110.
Examining the AD Docket
Docket No. FAA20210216; Project Identifier 2018CE061AD; Amendment 3921860; AD 20212602
RIN 2120AA64

Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all Gulfstream Aerospace Corporation Gulfstream Model GV and GVSP
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 your existing instructions for continued airworthiness ICA or inspection program for the airplane to establish a life limit of 20,000 flight cycles 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 January 14, 2022.
ADDRESSES: For service information identified in this final rule, contact Gulfstream Aerospace Corporation, Technical Publications Dept., 500
Gulfstream Road, Savannah, GA 31402
2206; phone: 800 8104853; fax: 912
9653520; email: pubs@gulfstream.com;
website: https www.gulfstream.com/
en/customer-support/. You may view this service information at the FAA, Airworthiness Products Section, SUMMARY:

You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210216; 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 W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Miral Patel, Aviation Safety Engineer, Atlanta ACO Branch, FAA, 1701
Columbia Avenue, College Park, GA
30337; phone: 404 4745590; fax: 404
4745606; email: miral.patel@faa.gov.
SUPPLEMENTARY INFORMATION:

pin remaining in service beyond its fatigue life could lead to fracture and failure of the trunnion pin.
In the NPRM, the FAA proposed to require revising the ALS of your ICA or inspection program for the airplane to establish a life limit of 20,000 flight cycles for the affected MLG trunnion pin. The FAA is issuing this AD to prevent MLG failure, which 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 costs.
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. This AD is adopted as proposed in the NPRM.

Background
Related Service Information
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 Aerospace Corporation Gulfstream Model GV and GVSP airplanes. The NPRM published in the Federal Register on September 17, 2021 86 FR 51842. The NPRM was prompted by notification from Gulfstream that a life limit for replacing MLG trunnion pin part number P/N
1159SCL56615 had been omitted from the ALS of the maintenance manual for Model GV and GVSP 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
The FAA reviewed Gulfstream GV
Aircraft Maintenance Manual, Revision 53, dated March 15, 2021; Gulfstream G550 Aircraft Maintenance Manual, Revision 34, dated March 15, 2021; and Gulfstream G5005000 Aircraft Maintenance Manual, Revision 34, dated March 15, 2021. For the applicable marketing designation specified on each document, the revised service information adds a life limit for MLG trunnion pin P/N 1159SCL56615.
Costs of Compliance The FAA estimates that this AD
affects 516 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS
Labor cost
Parts cost
Revise the ALS

1 work-hour $85 per hour = $85

Not applicable

Authority for This Rulemaking
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Cost per airplane
Action
Title 49 of the United States Code specifies the FAAs 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 Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section
VerDate Sep<11>2014

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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.

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$85

Cost on U.S.
operators $43,860

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:

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