Airworthiness directives › 2020-25-12
AD 2020-25-12 Airworthiness Directives; Superior Air Parts, Inc. Engines and Lycoming Engines Reciprocating Engines With a Certain SAP Crankshaft Assembly
Makes named: lycoming, superior air parts. Models named: IO-360-series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the reciprocating engine models identified in paragraphs (c)(1) and (2) of this AD with a Superior Air Parts, Inc. (SAP) crankshaft assembly, part number (P/N) SL36500-A20 or P/N SL36500-A31, with serial numbers 82976-01; 82976-02; SP12-0003 through SP12-0089, inclusive; SP13-0034 through SP13-0150, inclusive; or SP14-0151 through SP14-0202, inclusive; installed. (1) With SAP crankshaft assembly, P/N SL36500-A20, installed: (i) SAP Model IO-360-series and O-360-series reciprocating engines. (ii) Lycoming Engines (Lycoming) Model IO-360-B2F, IO-360-L2A, O-360, O-360-A2A, O-360-A2D, O-360-A2E, O-360-A2F, O-360-A2G, O-360-B2A, O-360-C2A, O-360-C2C, O-360-C2D, O-360-C2E, O-360-D2A, and O-360-D2B reciprocating engines. (2) With SAP crankshaft assembly, P/N SL36500-A31, installed: (i) SAP Model IO-360-series and O-360-series reciprocating engines. (ii) Lycoming Model AEIO-360-H1A, IO-360-B1A, IO-360-B1B, IO-360-B1D, IO-360-B1E, IO-360-B1F, IO-360-M1A, O-360, O-360-A1A, O-360-A1C, O-360-A1D, O-360-A2A, O-360-C1A, O-360-C1G, O-360-C1C, O-360-C1E, and O-360-C1F reciprocating engines. Note 1 to paragraph (c): This SAP crankshaft assembly may be installed as a replacement part under parts manufacturer approval on the affected Lycoming engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 25 engine operating hours after the effective date of this AD, remove the crankshaft assembly from service.
Unsafe condition
This AD was prompted by three crankshaft assembly failures that resulted in the loss of engine power and immediate or emergency landings. The FAA is issuing this AD to prevent failure of the crankshaft assembly. The unsafe condition, if not addressed, could result in failure of the engine, in-flight shutdown, and loss of the airplane.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1