AD 86-14-07
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
Operation with a failed pilot's yaw control rod assembly, P/N 76400-00034-041, which may have dents, cracks, distortion, bowing, or incorrect heat treat (hardness).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the push rod assembly for dents, cracks, distortion, or bowing prior to further flight. Within 25 hours' time in service after the AD's effective date, inspect the rod assembly's heat treat condition. Replace the rod assembly with a new or serviceable component if defects are found, before further flight. Install a placard prohibiting single pilot operation if initial inspection is clear, until the second inspection is done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight for initial inspection and replacement; within 25 hours' time in service after the effective date for heat treat inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Model S-76A helicopters and S-76B helicopters with serial numbers 760262, 760269, 760299, 760303, and 760310 through 760319.
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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