AD 2007-04-19
Unsafe Condition
Cylinder separation in SAP cast cylinder assemblies installed in TCM, LE, and AL reciprocating engines, which can lead to engine failure, a possible engine compartment fire, and damage to the airplane.
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Required Actions
Remove from service certain SAP part numbered (P/N) cast cylinder assemblies installed in TCM, LE, and AL reciprocating engines. Remove from service certain cast cylinder assemblies installed as original equipment in SAP reciprocating engines, or in certain overhauled or repaired SAP reciprocating engines.
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Compliance Time
Before further flight
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Affected Aircraft
SAP cast cylinder assemblies with part numbers SA47000L, SA47000S, SA52000, SA55000, SL32000W, SL32000WH, SL32006W, SL36000TW, SL36000W, and SL36006W, installed in TCM 470, 520, and 550 series engines, LE 320, 360, and 540 series engines, AL 540 series engines, and SAP 360 series engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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