AD 56-20-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2 | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47H-1 | Airworthiness Directives; Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters |
Unsafe Condition
Failure of the tail rotor hub retention bolts P/N 47-641-052-1 has occurred in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the two tail rotor retention bolts and replace them with new retention bolts of the same part number, establishing a service life limit of 300 hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as possible but not later than October 20, 1956
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 47B, 47B3, 47D, 47D1, 47G, 47G2 and 47H1 Helicopters
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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