AD 52-01-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Scotts-Bell 47 Inc | 47D1 | Airworthiness Directives; Bell Model 47D1 Helicopters |
Unsafe Condition
The possibility of throwing blades in flight due to the existing 47-661-030-1 hub assembly in the cooling fan.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework the existing 47-661-030-1 hub, reassemble the fan using parts from the modification kit, and balance the modified fan assembly (P/N 47-661-036-5) according to specified procedures before installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next 300-hour overhaul, but not later than March 1, 1952.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Model 47D1 Helicopters having 47-661-030-1 Hub Assembly in the Cooling Fan.
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.