AD 76-21-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47K | Airworthiness Directives; Bell Model 47K Helicopters |
Unsafe Condition
Fatigue cracking of the tubular spar of the synchronized elevator at the rollpin hole and cracks in the inboard rib could lead to elevator separation from the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect elevators for cracks in the tubular spar and inboard rib using a 5-power magnifying glass within 25 hours' time in service. If cracks are found, modify with Bell Kit 47-3746-1/2 or FAA-approved equivalent. If no cracks, install clevis pin per specified procedures and reinspect every 50 hours' time in service until modification is done. For inboard rib cracks, repair or modify with the kits. Reinstall and rerig elevators as required.
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Compliance Time
within 25 hours' time in service after the effective date of this AD
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Affected Aircraft
Bell Model 47K helicopters certificated in all categories
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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