AD/CFM56/31 High Pressure Compressor (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/CFM56/31 High Pressure Compressor 7/2009

Applicability:

CFM International S.A. CFM56-2, CFM56-3, CFM56-5A, CFM56-5B, CFM56-5C, and CFM56-7B series turbofan engines with a high-pressure compressor (HPC) 4-9 spool that has a part number (P/N) and serial number (SN) specified in Table 1 of this AD, installed.

Note 1:  These engines are installed on, but not limited to, Airbus A319, A320, and A340 aeroplanes and Boeing 737 aeroplanes.

Table 1 - HPC 4-9 Spools by P/N and SN

HPC 4-9 Spool P/N	HPC 4-9 Spool SN
9513M93G08	MPON1641
1590M29G01	GWN0087D
1590M29G01	GWN00MG2
1590M29G01	GWN011LG
1590M29G01	GWN01285
1590M29G01	GWN021JC
1590M29G01	GWNFY923
1590M29G01	GWNFY924
1590M29G01	GWNPA756
1590M29G01	GWNPG015
1590M29G01	GWNWC515
1590M29G01	GWNWR523

1590M29G01	GWNWT631
1590M29G01	GWNYC495
1588M89G03	GWN03K1R
1588M89G03	GWN03N61
1588M89G03	GWN03N6C
1588M89G03	GWN040L9
1588M89G03	GWN0468N
1588M89G03	GWN05AMO
1277M97G02	GWNE1298
1277M97G02	GWNE1564
1277M97G02	GWNJ7891
1277M97G02	GWNT4187
9513M93G11	GWNB3373
1358M94G01	GWNU0169

Requirement:

1.    Remove HPC 4-9 spools from service that have a P/N and S/N listed in Table 1 of this AD.

2.    Do not install any engine with an HPC 4-9 spool that has a P/N and SN specified in Table 1 of this AD.

Note 2:  FAA AD 2009-11-02 Amdt 39-15912 dated 13 May 2009 refers.

Compliance:

For Requirement 1 - Before accumulating 8,900 cycles-since- repair at Propulsion Technology LLC (PTLLC) or within 1,100 cycles from the effective date of this AD, which ever occurs later.

For Requirement 2 - After the effective date of this AD.

This Airworthiness Directive becomes effective on 2 July 2009.

Background: This AD results from reports of certain HPC 4-9 spools that PTLLC improperly repaired and returned to service.  The issuing of this AD is intended to prevent cracking of the HPC 4-9 spool, which could result in a possible uncontained failure of the spool and damage to the aeroplane.

James Coyne
Delegate of the Civil Aviation Safety Authority

22 May 2009