AD 47-32-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47B | Airworthiness Directives; Bell Model 47B Helicopters |
Unsafe Condition
Chafing of the intake manifold balance pipe against the oil tank.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install an extra piece of hose (Aircooled P/N 11868) on the pipe at the side of the tank near the oil filter mount, approximately 1 3/8 inches from the manifold pipe connection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
next 25-hour inspection after September 15, 1947
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 47B helicopters with Aircooled 6V4-178-B3, -B32, O-335-1, or O-335-3 engines.
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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