AD 69-16-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-C18 | ALLISON Model 250-C18 Engines |
Unsafe Condition
The lower gear box and oil outlet magnetic plugs may exhibit metal particles indicating incipient engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the lower gear box and oil outlet magnetic plugs daily at intervals not exceeding five hours' time in service. Install a visual magnetic plug indicator by November 3, 1969, as per Bell Service Letter 206A-129 or equivalent. After installing the indicator, the daily inspections are no longer required.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Effective immediately upon receipt of this AD for inspections; install the indicator on or before November 3, 1969.
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Affected Aircraft
Rolls-Royce Corporation Model 250-C18 engines installed in Bell Model 206A Helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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