Data / Federal rules / 2025-20085
Airworthiness Directives; Twin Commander Aircraft LLC Airplanes
The Federal Aviation Administration published this proposed rule in the Federal Register on November 18, 2025. Comments closed on January 2, 2026.
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What the agency says
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.
Key facts
- Document number
- 2025-20085
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- November 18, 2025
- Comments due
- January 2, 2026
- Dates
- The FAA must receive comments on this proposed AD by January 2, 2026.
- Docket
- Docket No. FAA-2025-3438; Project Identifier AD-2025-01163-A
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 8
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in November 2025
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.