AD 57-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | Airworthiness Directives; MARTIN Models 202, 202A and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 202A | Airworthiness Directives; MARTIN Models 202, 202A and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 404 | Airworthiness Directives; MARTIN Models 202, 202A and 404 Aircraft |
Unsafe Condition
Failures of engine mount attaching studs due to misalinement and/or improper torque during installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace engine mount studs with approved studs at intervals not exceeding 1,600 hours flight time, or replace with approved through-bolt installations. Ensure proper installation techniques as per Martin Service Instruction Letter 404-50.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated. Replace studs whenever the Quick Engine Change unit is removed for major overhaul, but at intervals not exceeding 1,600 hours flight time.
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Affected Aircraft
Martin-Marietta Corporation Models 202, 202A, and 404 aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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