AD 52-01-03
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 existing damper lever and link assemblies (P/N 47-140-158 and -159) may seize due to insufficient lubrication, leading to bearing failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the existing damper lever and link assemblies (P/N 47-140-158 and -159) with the 47-140-158-1 lever and 47-140-159-1 link assembly to provide adequate lubrication and prevent bearing seizure.
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, 47B3, and Model 47D helicopters serial numbers 1 to 100 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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