AD 76-08-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61A | Airworthiness Directives; Sikorsky Models S-61L, S-61A, S-61D, S-61E, and S-61V Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61D | Airworthiness Directives; Sikorsky Models S-61L, S-61A, S-61D, S-61E, and S-61V Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61E | Airworthiness Directives; Sikorsky Models S-61L, S-61A, S-61D, S-61E, and S-61V Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61L | Airworthiness Directives; Sikorsky Models S-61L, S-61A, S-61D, S-61E, and S-61V Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61V | Airworthiness Directives; Sikorsky Models S-61L, S-61A, S-61D, S-61E, and S-61V Helicopters |
Unsafe Condition
Separation of the tail rotor pylon due to cracks in the pylon hinge fittings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect upper and lower pylon hinge fitting assemblies within 30 hours' time in service after the effective date, and every 150 hours thereafter. Replace fittings if cracks are found around bushings or beyond specified limits. Rework cracks below limits or address insufficient clearance between fittings and alignment pad prior to further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 hours' time in service after the effective date of this AD, unless already accomplished within the last 120 hours' time in service, and thereafter at intervals not to exceed 150 hours' time in service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Models S-61L (serial numbers prior to and including 61454), S-61A, S-61D, S-61E, and S-61V helicopters.
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
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