AD/CFM56/32 - Engine Hydromechanical Unit (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.

CFM International Turbine Engines - CFM56 Series AD/CFM56/32 Engine Hydromechanical Unit 10/2009 TX

Applicability: CFM International SA CFM56-5B engine models equipped with Hydromechanical units (HMU) VIN 8061-532 (P/N 1348M79P10), VIN 8061-535 (P/N 1348M79P13), VIN 8061-536 (P/N 1348M79P14), Serial Numbers (S/N) as identified within paragraph 1.A of CFM Service Bulletin CFM56-5B S/B 73-0238 Revision 1 and which have not been modified in accordance with CFM56-5A S/B 73-0208, CFM56-5B S/B 73-0239 or CFM56-5C S/B 73-0180.

Note 1: These engines are known to be installed on, but not limited to Airbus A318, A319, A320 and A321 series aeroplanes. Requirement: 1. Check engine records for any occurrence of ECAM (Electronic Centralized Aircraft Monitoring) "ENG X START FAULT- ENG X STALL" and/or "ENG X COMPRESSOR VANE" warnings since entry into service of the HMUs.

Note 2: The letter "X" in ECAM warnings above is a placeholder for a numeral varying from 1 to 2.

2. For engines which have displayed before the effective date of this AD, any of the ECAM warnings described in Requirement 1 of this AD, replace the affected HMU with a serviceable unit.