AD 47-10-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
Aluminum alloy bulkhead fittings for fuel, oil, and hydraulic lines and buting with cut-length hose connections in nacelle zones 1 and 2 may fail to provide adequate fire resistance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace aluminum alloy bulkhead fittings with nickel steel or equivalent fire-resistant fittings. Replace buting having cut-length hose connections with flexible coupled hose assemblies in nacelle zones 1 and 2.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to July 1, 1947
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Affected Aircraft
Lockheed Aircraft Corporation Model 49 serial numbers up to and including 2075
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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