AD 2004-08-10
Unsafe Condition
Reports of 34 failures of cylinder heads marketed by ECi, leading to cracks in the cylinder head and potential engine failure due to cylinder head separation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace certain serial-numbered (SN) cylinders supplied by ECi before further flight.
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Compliance Time
Before further flight
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Affected Aircraft
Teledyne Continental Motors (TCM) models 520 and 550 series engines with certain ECi cylinders installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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