Airworthiness Directives; Various Helicopters
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,
| Agency | Transportation Department, Federal Aviation Administration |
|---|---|
| Document type | Proposed Rule |
| Published | 2026-04-23 |
| Summary | 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 requi |
| Document number | 2026-07937 |
| Official record | https://www.federalregister.gov/documents/2026/04/23/2026-07937/airworthiness-directives-various-helicopters |