AD 2020-25-12

final rule
Data completeness: 70%

Airworthiness Directives; Superior Air Parts, Inc. Engines and Lycoming Engines Reciprocating Engines With a Certain SAP Crankshaft Assembly

AD Number
2020-25-12
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. FAA-2018-1077
FR Citation
85 FR 79828

Applicability

TypeManufacturerModelDetails
engine Lycoming Engines Reciprocating Airworthiness Directives; Superior Air Parts, Inc. Engines and Lycoming Engines Reciprocating Engines With a Certain SAP Crankshaft Assembly

Unsafe Condition

The presence of a white layer on the crankshaft assembly, which is brittle and can lead to spalling or fatigue cracking of the crankshaft assembly as a result of the normal mechanical loads during engine operation.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Remove from service all affected crankshaft assemblies.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

This AD is effective January 15, 2021.

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

All Superior Air Parts, Inc. (SAP) Model IO-360-series and O-360-series reciprocating engines and certain Lycoming Engines (Lycoming) Model AEIO-360-, IO-360-, and O-360-series reciprocating engines with a certain SAP crankshaft assembly installed.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Lycoming Engines Reciprocating

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