AD 2025-20-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental | Aerospace Technologies GmbH | Airworthiness Directives; Continental Aerospace Technologies GmbH Engines |
Unsafe Condition
Cracks in the cylinder heads can cause engine coolant to leak into the combustion chamber, leading to engine overheat and eventual failure or seizure.
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Required Actions
Inspect the engine coolant for contamination. Replace the cylinder heads with a serviceable part if coolant sample has aluminum or fluoride exceeding acceptable range. Drain, flush, and refill the cooling system with new coolant if any contamination exceeds acceptable range, except for aluminum and fluoride. Prohibit installation of a cylinder head unless it is serviceable.
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Compliance Time
Within 5 flight hours for engines with 50 flight hours or more since the last coolant replacement or since new.
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Affected Aircraft
Continental Aerospace Technologies GmbH Model TAE 125-02-125 engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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