AD 54-24-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 1049C-55 | LOCKHEED Models 1049C, 1049E, and 1049D |
| aircraft | Lockheed Aircraft Corporation | 1049D-55 | LOCKHEED Models 1049C, 1049E, and 1049D |
| aircraft | Lockheed Aircraft Corporation | 1049E-55 | LOCKHEED Models 1049C, 1049E, and 1049D |
Unsafe Condition
Cracks in the outer wing main beam web between Stations 551 and 637, left and right, which may not be detectable by inspection for fuel stains alone due to sealant on the tank surface.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a visual inspection for cracks between Stations 551 and 637, left and right, as soon as practical and reinspect every 125 hours until reinforced. Reinforce the area with extruded aluminum alloy stiffeners (LS347-3) as soon as possible but not later than 1,000 hours after receipt of parts or March 1, 1955, whichever comes first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
As soon as practical for initial inspection; reinspect at intervals of approximately 125 hours until reinforced. Reinforcement must be completed not later than 1,000 hours after receipt of parts from the manufacturer or March 1, 1955, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Models 1049C (Serial Numbers 4520-4548), 1049E (Serial Numbers 4549-4556, 4558-4560, 4563-4565), and 1049D (Serial Numbers 4163-4166).
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.