AD 47-10-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
Failure of the engine oil lines to have seal plates and cover plates on the alternate oil line cutouts in the engine fire seals could result in uncontained engine failure and fire.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Add seal plates to engine oil lines passing through engine fire seals and install cover plates on alternate oil line cutouts during engine replacement in quick-change powerplant units.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
after each engine change
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Affected Aircraft
Lockheed Aircraft Corporation Model 49 serial numbers up to and including 2088
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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