AD 47-10-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49-46 and 49-51 Airplanes |
Unsafe Condition
Failure to convert Model 49-51 airplanes to Model 49-46 configuration through installation of required service bulletins may result in unsafe operation due to non-compliance with performance values in the Operation Manual.
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Required Actions
Convert all Model 49-51 aircraft to Model 49-46 configuration by complying with specified service bulletins including 49/SB-1, 49/SB-14, 49/SB-24, 49/SB-124, Wright C18-23, 49/SB-230, and 49/SB-231. Recertification requires compliance with these bulletins. Check compliance with revised bulletins within next 200 hours of operation for previously certified aircraft.
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Compliance Time
prior to June 1, 1947
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Affected Aircraft
Lockheed Model 49-46 serials up to and including 2075 and all Model 49-51 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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