AD 63-13-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 404 | MARTIN Model 404 Aircraft |
Unsafe Condition
Cracks have been found in the upper portion of the 0.250 inch radius at the junction of the axle and the piston terminal (approximately 2.4 inches from the centerline of the main gear) of main landing gear piston/axle assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect for cracks at specified intervals based on time in service. For assemblies with 5,000+ hours, inspect within next 150 hours and every 150 hours thereafter. For those with less than 5,000 hours, inspect prior to 5,150 hours and every 150 hours thereafter. Every fifth inspection (every 750 hours) must use dye penetrant/Zyglo with 10x magnification. Replace or rework parts if cracks are found beyond specified limits.
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Compliance Time
Compliance required as indicated.
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Affected Aircraft
All Model 404 Aircraft with Main Landing Gear Piston/Axle Assembly P/N 202SD82087 (Menasco P/N 511017).
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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