AD 86-19-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-76A | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-76B | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters |
Unsafe Condition
The use of improperly manufactured tail rotor assemblies/spars could result in possible operation with an unsafe tail rotor assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the listed serial numbered tail rotor assemblies/spars and replace with serviceable parts. Aircraft may be ferried under FAR Sections 21.197 and 21.199 to a base for AD compliance. Alternate means of compliance may be approved upon request.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight after receipt of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Corporation Model S-76A (serial numbers A1 37-00766, -00774, -00775, -00779, -00781, -00783, and -00785) and S-76B (serial numbers A245-00025, -00026, -00027, -00028, -00037, -00040, -00041, and -00047) helicopters equipped with specified tail rotor blade assemblies (part numbers 76101-05001, 76101-05101 for S-76A and 76101-05501 for S-76B).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.