AD 47-49-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
Cracks in the aileron leading edge ribs at Stations 571 and 577, adjacent leading edge skin, and counterbalance supports.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the aileron leading edge ribs at Stations 571 and 577, adjacent leading edge skin, and counterbalance supports at intervals not to exceed 250 flight hours. Install heavier supports, new rib elements, new leading edge skin, and rib reinforcements when cracks are found. Discontinue inspections after reinforcing both ribs and installing heavier supports.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At periods not to exceed 250 hours
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Aircraft Corporation Model 49 serial numbers up to and including 2046.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.