AD 76-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47E | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47H-1 | Airworthiness Directives; Bell Models 47B, 47B-3, 47D, 47D-1, 47E, 47G, 47G-2, and 47H-1 Helicopters |
Unsafe Condition
Fatigue failure of the tail rotor yoke, Part Number 47-641-057-9, with specified serial numbers (SR29-50501 through SR29-50507, SR-29-50509 through SR29-50528, SR29-50530 through SR29-50533, SR29-50535 through SR29-50537, SR29-50539 through SR29-50544, and SR29-50546 through SR29-50554).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace tail rotor yokes with 390 or more hours' total time in service on the effective date within 10 hours' time in service. Replace those with less than 390 hours' total time prior to accumulating 400 hours' total time in service. Compliance can be achieved via Bell Helicopter Company Service Bulletin 47-05-73-1, Revision A.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours' time in service for yokes with 390+ hours on effective date; prior to accumulating 400 hours' total time in service for others.
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, 47E, 47G, 47G-2, and 47H-1 helicopters with tail rotor yokes having specified serial numbers.
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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