AD/LYC/112 - Lycoming Crankshaft Replacement (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Lycoming Piston Engines AD/LYC/112 Lycoming Crankshaft Replacement 12/2005 DM

Applicability: Lycoming Engines AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO-540, O-540, and TIO-540 series reciprocating engines, rated at 300 horsepower (HP) or lower, that are manufactured new, rebuilt, overhauled after 01 March 1999; OR that had a crankshaft installed after 01 March 1999. Requirement: 1. AEIO-540, IO-540, O-540, and TIO-540 series engines manufactured new or rebuilt, overhauled, or that had a crankshaft installed after 01 March 1999: For AEIO-540, IO-540, O-540, and TIO-540 series engines manufactured new or rebuilt, overhauled, or that had a crankshaft installed after 01 March 1999, do the following: a. If Table 1 or Table 2 of Lycoming Mandatory Service Bulletin (MSB) No. 566 dated 11 July 2005 lists your engine serial number (SN), use Table 4 to verify the crankshaft SN. b. If Table 4 of Lycoming MSB 566 lists your crankshaft SN, replace the crankshaft with a crankshaft that is not listed in Table 4 of Lycoming MSB No. 566. 2. AEIO-360, IO-360, O-360, LIO-360, and LO-360 series engines manufactured new or rebuilt, overhauled, or that had a crankshaft installed after 01 March 1999: For AEIO-360, IO-360, O-360, LIO-360, and LO-360 series engines manufactured new or rebuilt, overhauled, or that had a crankshaft installed after 01 March 1999, do the following: a. If Table 3 of Lycoming MSB 566 lists your engine SN, use Table 4 to verify the crankshaft SN. b. If Table 4 of Lycoming MSB 566 lists your crankshaft SN, replace the crankshaft with a crankshaft that is not listed in Table 4 of Lycoming MSB 566. 3. Do not install any crankshaft that has a SN listed in Table 4 of Lycoming MSB 566 into any engine. Note: FAA Airworthiness Directive (AD) 2005-19-11 Amendment 39-14276 refers.