AD 59-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 1049C-55 | LOCKHEED Models 1049C, 1049D, 1049E, 1049G and 1049H Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049D-55 | LOCKHEED Models 1049C, 1049D, 1049E, 1049G and 1049H Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049E-55 | LOCKHEED Models 1049C, 1049D, 1049E, 1049G and 1049H Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049G-82 | LOCKHEED Models 1049C, 1049D, 1049E, 1049G and 1049H Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049H-82 | LOCKHEED Models 1049C, 1049D, 1049E, 1049G and 1049H Aircraft |
Unsafe Condition
Cracking in the inner wing rear spar web at Wing Station 458 in the upper and lower notched web area.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the inner wing rear spar web at Station 458 for cracks in the upper and lower notched web area. If cracks are found, incorporate the reinforcements shown in Lockheed Drawing 555353. If no cracks are found, reinforcements may be incorporated or reinspect at 4,000 flight-hour periods or block overhaul intervals.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next block overhaul or 4,000 flight-hours, whichever occurs first
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Models 1049C, 1049D, 1049E, 1049G, and 1049H Aircraft
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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