AD 76-24-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Revo, Incorporated | Lake LA-4-200 | Airworthiness Directives; Consolidated Aeronautics Model Lake LA-4-200 Airplanes |
Unsafe Condition
Engine oil cooler failures allowing rapid loss of engine oil which could result in engine stoppage.
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Required Actions
Inspect the engine oil cooler (fluid fitting side) to determine if it is Model 8406J S/N 101 through 1500. If it is, replace with an FAA approved oil cooler not of the same model and serial number. If not, record the inspection in aircraft maintenance records.
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Compliance Time
Before next flight of the affected airplanes for inspection; prior to further flight for replacement if applicable.
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Affected Aircraft
Lake Model LA-4-200 airplanes certified in all categories equipped with Stewart Warner Model 8406J engine oil coolers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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