AD/CFM56/22 - EGT Harnesses and EGT Couplings (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 39.1 (1) of CAR 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.

CFM International Turbine Engines - CFM56 Series

AD/CFM56/22 EGT Harnesses and EGT Couplings 3/2003

Applicability: CFM56-5 and -5B series turbofan engines that have an exhaust gas temperature (EGT) upper harness part number (P/N) CA170-00, with a serial number (S/N) of YC021674 or lower, or an EGT lower harness P/N CA171-00, with a S/N of YC026641 or lower, or an EGT coupling P/N CA172-02 with a S/N of YC166736 or lower.

Note 1: These engines are installed on, but not limited to, Airbus Industrie A318, A319, A320 and A321 aeroplanes.

Note 2: Harnesses or couplings having a serial number that is followed by the letter "W" are not affected by this Directive.

Requirement: 1. If EGT harnesses and EGT couplings have accumulated less than 3,000 engine flight hours since installation, carry out either of the following actions:

1. Replace affected EGT harnesses and EGT couplings, not being trend monitored, with serviceable parts in accordance with CFM International Service Bulletins CFM56-5 S/B 77-0020 or CFM56-5B S/B 77-0008, both dated 4 March 2002, as applicable, or