Data / Federal rules / 2026-07937
Airworthiness Directives; Various Helicopters
The Federal Aviation Administration published this proposed rule in the Federal Register on April 23, 2026. Comments closed on June 8, 2026.
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What the agency says
The FAA proposes to supersede Airworthiness Directive (AD) 2020-02-17, which applies to certain Sikorsky Aircraft Corporation (Sikorsky) Model S-70, S-70A, S-70C, S-70C(M), and S-70C(M1) helicopters. AD 2020-02-17 requires recurring visual and tap inspections of the tail rotor blade (TRB) and, depending on the results, replacing the TRB. Since the FAA issued AD 2020-02-17, it was determined additional helicopter models are affected by the unsafe condition. The manufacturer has developed a split pitch horn modification and a safety enhancement modification kit for the TRB. This proposed AD would continue to require the actions of AD 2020-02- 17, would expand the applicability, and would require modifying and re- identifying the TRB. This proposed AD would also require revising the airworthiness limitations section (ALS) of the existing helicopter maintenance manual or instructions for continued airworthiness and the existing approved maintenance or inspection program, as applicable, to incorporate recurring inspections of the TRB disbond indicator. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-07937
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- April 23, 2026
- Comments due
- June 8, 2026
- Dates
- The FAA must receive comments on this proposed AD by June 8, 2026.
- Docket
- Docket No. FAA-2026-3863; Project Identifier AD-2024-00567-R
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 4
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in April 2026
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.