AD 2000-11-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation Model S-76 | Airworthiness Directives; Sikorsky Aircraft Corporation Model S-76 Series Helicopters |
Unsafe Condition
Improper manufacture of certain main rotor blade skins can cause a crack in the root end pocket and root end pocket separation during flight.
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Required Actions
Determine the serial number (S/N) of each main rotor blade. Remove main rotor blades identified by S/N in Group 1 of the ASB Planning Information before further flight. Visually inspect main rotor blades identified by S/N in Group 2 of the ASB Planning Information before each flight and at intervals not to exceed 3 hours time-in-service for span-wise cracks in the upper and lower root end area. Remove and replace any main rotor blade with a span-wise crack before further flight.
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Compliance Time
Before further flight
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76 series helicopters, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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