AD 61-01-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | MARTIN Models 202, 202A and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 202A | MARTIN Models 202, 202A and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 404 | MARTIN Models 202, 202A and 404 Aircraft |
Unsafe Condition
Failures of Model 404 main landing gear torque arms have occurred in the lower attachment point where the torque scissors attach to the strut, and a failure was found in the apex (upper to lower torque arm attach point).
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Required Actions
Inspect torque arm lugs and apex surfaces for cracks or corrosion using dye penetrant, ultrasonic, radiographic method, or FAA approved equivalent. Remove bolts and bushings if dye penetrant is used. Replace torque arm before next flight if cracks or corrosion are found.
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Compliance Time
within the next 225 hours' time in service, unless already accomplished within the last 225 hours' time in service, and every 450 hours' time in service thereafter
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Affected Aircraft
Martin-Marietta Corporation Models 202, 202A, and 404 aircraft with main landing gear torque arms having more than 12,000 hours' time in service.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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