AD 52-01-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B and 47B3 and 47D Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47B and 47B3 and 47D Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47B and 47B3 and 47D Helicopters |
Unsafe Condition
The tail rotor blade grip retaining bolt may fail due to insufficient service life, leading to blade detachment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the existing 47-641-026-1 bolt with the 47-641-052-1 bolt and torque to 160-190 inch-pounds. Replace the 47-641-036-1 flat washer type micarta seal with the 47-641-042-1 cup seal type on Models 47B and 47B3.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next 300-hour overhaul, but not later than March 1, 1952
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Affected Aircraft
Scotts-Bell 47 Inc Model 47B and 47B3 helicopters and Model 47D helicopters serial numbers 1 to 110, inclusive.
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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