AD 52-08-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 18 | LOCKHEED Model 18 Aircraft |
Unsafe Condition
Failure to seal the inboard end of the integral fuel tanks as per Lockheed Drawing No. 50829, change A, could allow gasoline fumes to accumulate in the passenger compartment in case of fuel tank leakage.
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Required Actions
Inspect Model 18 Series aircraft converted from military to civil status for compliance with Lockheed Drawing No. 50829, change A. Install diaphragms and vents as required by the drawing. Remove overhead or floor panels to access the area for inspection.
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Compliance Time
next annual inspection, but in no event later than June 1, 1953
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Affected Aircraft
Lockheed Aircraft Corporation Model 18 aircraft designated C57, C57B, R50-1, R50-2, R50-3, R50-5, R50-6, C60, C60A, and C59, converted from military versions to civil status
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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