AD 62-19-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 149-46 | LOCKHEED All Models 49, 149, 649, 749, and 749A Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED All Models 49, 149, 649, 749, and 749A Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 649-79 | LOCKHEED All Models 49, 149, 649, 749, and 749A Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 649A-79 | LOCKHEED All Models 49, 149, 649, 749, and 749A Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 749-79 | LOCKHEED All Models 49, 149, 649, 749, and 749A Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 749A-79 | LOCKHEED All Models 49, 149, 649, 749, and 749A Series Aircraft |
Unsafe Condition
Cracks in the main landing gear pistons in the area immediately above the weld retaining the metering pin bulkhead, with some cases of complete fatigue failure.
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Required Actions
Inspect main landing gear pistons (Cleveland Pneumatic Tool Co., P/N 8298-4, 8298B-4, 8298C-4, 8298C-4A, 8298D-4, 8298F-4) for cracks above the weld using dye penetrant, magnetic particle, or ultrasonic methods. Modify or repair cracked pistons exceeding 0.050 inch depth per Lockheed FS/256603L or FAA-approved equivalent. Repaired/modified pistons must be re-designated or marked with 'R'. Discontinue inspections if modified pistons are installed.
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Compliance Time
Within 800 hours' time in service after the effective date (September 24, 1962), and thereafter every 2,000 hours' time in service. Initial inspections within 1,200 hours prior to effective date may be used, with subsequent intervals starting within 2,000 hours from that date.
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Affected Aircraft
Lockheed Aircraft Corporation models 149-46, 49-46, 649-79, 649A-79, 749-79, 749A-79 with Cleveland Pneumatic Tool Company main landing gear pistons P/N 8298-4, 8298B-4, 8298C-4, 8298C-4A, 8298D-4, or 8298F-4.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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