AD 47-10-39
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
Cracks in the trailing edge and aft portions of the ribs of the aileron inboard of the trim tab.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the aileron inboard of the trim tab for cracks in the trailing edge and ribs every 250 flight hours. Install heavier gauge parts and rebalance the aileron when cracks are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At periods not to exceed 250 hours
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Affected Aircraft
Lockheed Aircraft Corporation Model 49 serials up to and including 2046 with all metal ailerons not installed.
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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