AD 80-14-16 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-76A | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A Series Helicopters |
Unsafe Condition
Operation with a displaced shear bearing inner race and a possible cracked main rotor blade spindle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect main rotor blade spindle assemblies per SB 76-65-13A; remove service any spindle with missing or displaced shear bearing inner race beyond 1/2 inch; replace spindles with previously reworked or missing bearings; modify and inspect spindles within 25 hours time in service after July 12, 1980; replace 'Cable-TYs' with sleeve type retainers by February 15, 1981; inspect spindles with 200+ hours for cracks within 5 hours time in service; report discrepancies within 24 hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight; within the next 25 hours time in service after July 12, 1980; prior to February 15, 1981; within the next 5 hours time in service after July 12, 1980.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Aircraft Model S-76A series helicopters certificated in all categories.
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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