AD 2014-05-29
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental | Motors | Airworthiness Directives; Continental Motors, Inc. Reciprocating Engines With Superior Air Parts, Inc. (SAP) Cylinder Assemblies Installed |
Unsafe Condition
Separation of the cylinder head, damage to the engine, and damage to the airplane due to cracks in SAP investment cast cylinder assemblies.
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Required Actions
Inspect and perform compression tests on SAP investment cast cylinder assemblies to detect cracks. Replace cylinders after 12 years from date placed in service. Remove and do not reinstall cylinders that have been removed for maintenance.
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Compliance Time
Within the compliance times specified in the AD, unless already done.
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Affected Aircraft
Continental Motors, Inc. (CMI) IO-520, TSIO-520, and IO-550 series reciprocating engines, and all other engine models approved for the use of CMI 520 and 550 cylinder assemblies (e.g., CMI 470 series engines modified by STC), with SAP investment cast cylinder assemblies (P/Ns SA52000-A1, SA52000-A20P, SA52000-A21P, SA52000-A22P, SA52000-A23P, SA55000-A1, or SA55000-A20P) installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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