1AD/LYC/109 Amdt 2 - Crankshaft Gear Bolt

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AIRWORTHINESS DIRECTIVE

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For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (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.

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Lycoming Pistons Engines

AD/LYC/109

Amdt 2

Crankshaft Gear Bolt 13/2003

Applicability: 1. Except as described in Part 2 of this Applicability section:

Textron Lycoming O-540, IO-540, AEIO-540, TIO-540 and LTIO-540 series engines; either

Factory new, factory rebuilt and factory overhauled engines listed by serial number in Textron Lycoming Mandatory Service Bulletin (MSB) 554 and Supplements to Textron Lycoming Mandatory Service Bulletin (MSB) 554; or

b. Engines that have had a crankshaft gear bolt part number (P/N) STD-2209 installed at Textron Lycoming Williamsport in the period 27 November 1996 to 10 November 1998; or

c. Engines fitted with a crankshaft gear bolt P/N STD-2209 that was supplied originally by Textron Lycoming during the period 27 November 1996 to 10 November 1998 and installed during field maintenance or at a field overhaul since 27 November 1996.

2. This directive is not applicable to Textron Lycoming O-540, IO-540, AEIO-540, TIO-540 and LTIO-540 series engines:

Incorporating single drive dual magnetos; or

b. O-540-F model engines:

Having had crankshaft gear bolt P/N STD-2209 replaced in accordance with AD/LYC/104 or FAA AD 99-03-05; or

ii. Listed by serial number in Table 1 of MSB 554; and

iii. Where the crankshaft gear bolt has not been subsequently replaced with a bolt supplied by Textron Lycoming during the period 27 November 1996 to 10 November 1998; or

c. Engines fitted with a Superior Air Parts FAA approved PMA crankshaft gear bolt P/N SL-STD-2209; or

d. Engines fitted with a crankshaft gear bolt included in Textron Lycoming gear bolt replacement kit 05K19987; or

e. Engines fitted with a crankshaft gear bolt P/N STD-2247; or

f. Engines that are supported by CASA recognised supply documentation detailing that Textron Lycoming did not originally supply the currently installed crankshaft gear bolt during the period 27 November 1996 to 10 November 1998.