AD 2002-21-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; REVO, Incorporated Models Lake LA-4, Lake LA-4A, Lake LA-4P, Lake LA-4-200, and Lake Model 250 Airplanes |
| aircraft | Lake | LA-4 | Airworthiness Directives; REVO, Incorporated Models Lake LA-4, Lake LA-4A, Lake LA-4P, Lake LA-4-200, and Lake Model 250 Airplanes |
Unsafe Condition
Cracks in the upper and lower wing spar doublers and angles, which could lead to wing spar failure and wing separation from the airplane.
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Required Actions
Inspect the upper and lower wing spar doublers and angles for cracks after the incorporation of Modification Kit B-79 or FAA-approved equivalent. Replace any cracked wing spar doubler or angle. Report the results of the inspection to the FAA.
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Compliance Time
After the incorporation of Modification Kit B-79 or FAA-approved equivalent.
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Affected Aircraft
REVO, Incorporated Models Lake LA-4, Lake LA-4A, Lake LA-4P, Lake LA-4-200, and Lake Model 250 airplanes with Modification Kit B-79 or FAA-approved equivalent installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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