AD 67-19-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | Airworthiness Directives; MARTIN Models 202, 202A and 404 Airplanes |
| aircraft | Martin-Marietta Corporation | 202A | Airworthiness Directives; MARTIN Models 202, 202A and 404 Airplanes |
| aircraft | Martin-Marietta Corporation | 404 | Airworthiness Directives; MARTIN Models 202, 202A and 404 Airplanes |
Unsafe Condition
Cracks and corrosion in the engine mounts, specifically in the tubular members and welds, which could lead to structural failure of the engine mounts.
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Required Actions
Visually inspect engine mount tubular members and welds for cracks using at least 10-power glass or equivalent. Inspect for external and internal cracks and corrosion using Magnaflux and X-ray or equivalent methods after removing paint and sandblasting. Repair or replace cracked parts per FAA-approved procedures or equivalent, or replace with inspected parts. Increase inspection intervals if engine mounts are treated with hot linseed oil. Equivalent methods require FAA approval.
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Compliance Time
Within the next 100 hours' time in service after the effective date (June 20, 1967), unless already accomplished within the last 100 hours' time in service, and thereafter at intervals not to exceed 200 hours' time in service. For paragraph (b), within the next 250 hours' time in service after the effective date, unless already accomplished within the last 750 hours' time in service, and thereafter at intervals not to exceed 1000 hours' time in service or one year, whichever occurs first.
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Affected Aircraft
Martin-Marietta Corporation Models 202, 202A, and 404 airplanes with engine mounts having part numbers A10100, A10100-9, 2021C11039-9, A16647-81, 404-5000004, 404-5000004-59, 404-5000005, or 404-5000005-29.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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