AD 76-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47H-1 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 Helicopters |
Unsafe Condition
Fatigue failure of tail rotor hub bolt, Part Numbers 47-641-052-3 or -5.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and disassemble the tail rotor hub and blade assembly. Remove the metal grease seal from each tail rotor blade grip and install seal Part Number 47-641-042-3. Replace hub bolts with Part Number 47-641-194-1 as specified in maintenance manuals or FAA approved procedures. Assemble and track/balance the tail rotor hub and blade assembly per manuals or FAA procedures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 300 hours' time in service after the effective date of this AD unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Models 47B, 47B-3, 47D, 47D-1, 47G, 47G-2, and 47H-1 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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.