AD 49-05-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 749-79 | LOCKHEED Model 749 Aircraft |
| aircraft | Lockheed Aircraft Corporation | 749A-79 | LOCKHEED Model 749 Aircraft |
Unsafe Condition
The shank section of Curtiss 850-4C2-0 propeller blades delivered before November 1, 1948, with less than 700 hours service and not previously magnafluxed may contain undetected defects.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Magnetically inspect the shank section (outboard to 18-inch station) of all affected blades using a coil ≤27 inches diameter and ≥8,000 ampere turns. Prioritize inspection of blades with lowest service time.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
March 25, 1949
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Model 749-79 and 749A-79 aircraft equipped with Curtiss 850-4C2-0 propeller blades delivered before November 1, 1948, having less than 700 hours service and not previously magnafluxed.
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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