AD 65-04-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47B3 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47E | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2 | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2A | Airworthiness Directives; Bell Model 47 Series Helicopters |
| aircraft | Scotts-Bell 47 Inc | 47G-2A-1 | Airworthiness Directives; Bell Model 47 Series Helicopters |
Unsafe Condition
Some P/N 47-620-535-1 outer races installed in the freewheeling clutch may not have been tempered properly, leading to excessive wear and subsequent malfunction of the freewheeling clutch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a hardness test on the outer races as described by Bell Service Bulletin No. 141SB. Replace the outer race with one within the hardness limits before further flight if the test fails.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 25 hours' time in service after the effective date of this AD
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Affected Aircraft
Scotts-Bell 47 Inc Model 47 Series Helicopters equipped with transmissions serial numbers B12-885 through B12-969
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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