AD 2025-20085
Published 2025-11-18 · 4 models · 8 US-registered tails affected · Federal Register
Airworthiness Directives; Twin Commander Aircraft LLC Airplanes Federal Register ↗
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for all Twin Commander Aircraft LLC (Twin Commander) Model 685, 690, 690A, 690B, 690C, 690D, 695, and 695A airplanes. This proposed AD was prompted by reports of fatigue cracking affecting structural components within the fuselage and empennage structure. This proposed AD would require inspecting certain structural components within the fuselage and vertical stabilizer for any evidence of cracks, corrosion, or loose hardware, and inspecting the working fasteners at the diagonal braces of fuselage station (FS) 386 for cracks, elongation, or deformation; and depending on the results of the inspections, replacing with new parts or used parts or repairing, as applicable; and reporting inspection results to the FAA. The FAA is proposing this AD to address the unsafe condition on these products.
Applicability · by US fleet size
Federal Register text
Verbatim; the Federal Register publication is the legally binding document. Cite: 90 FR 51613. View on Federal Register ↗
[Federal Register Volume 90, Number 220 (Tuesday, November 18, 2025)] [Proposed Rules] [Pages 51613-51620] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2025-20085]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-3438; Project Identifier AD-2025-01163-A] RIN 2120-AA64
Airworthiness Directives; Twin Commander Aircraft LLC Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for all Twin Commander Aircraft LLC (Twin Commander) Model 685, 690, 690A, 690B, 690C, 690D, 695, and 695A airplanes. This proposed AD was prompted by reports of fatigue cracking affecting structural components within the fuselage and empennage structure. This proposed AD would require inspecting certain structural components within the fuselage and vertical stabilizer for any evidence of cracks, corrosion, or loose hardware, and inspecting the working fasteners at the diagonal braces of fuselage station (FS) 386 for cracks, elongation, or deformation; and depending on the results of the inspections, replacing with new parts or used parts or repairing, as applicable; and reporting inspection results to the FAA. The FAA is proposing this AD to address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by January 2, 2026.
ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. Fax: (202) 493-2251. Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2025-3438; 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 NPRM, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Lekebis Russell, Aviation Safety Engineer, FAA, 1701 Columbia Avenue, College Park, GA 30337; phone: (404) 474-5510; email: [email protected].