AD 84-08-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-76A | Airworthiness Directives; SIKORSKY AIRCRAFT DIVISION Model S-76A Helicopters |
Unsafe Condition
Failure of the tail rotor pitch control shaft bearing assembly and subsequent partial loss of directional control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the tail rotor pitch control shaft bearing assembly for axial movement in accordance with specified service bulletins or equivalent procedures. Replace the assembly if axial movement exceeds 0.010 inch as per the same procedures.
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Compliance Time
Within 25 hours time in service after the effective date of this AD unless already accomplished within the last 75 hours time in service and thereafter at intervals not to exceed 100 hours time in service from the last inspection.
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Affected Aircraft
Sikorsky Model S-76A helicopters equipped with Part Number 76000-05100-043 or -045 tail rotor pitch control shaft assemblies.
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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