1AD/CFM56/11 - Accessory and Transfer Gearbox Replacement

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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CFM International Turbine Engines - CFM56 Series

AD/CFM56/11 Accessory and Transfer Gearbox Replacement

6/98 TX

Applicability: CFM International (CFMI) CFM 56-5, 56-5B and 56-5C, all models, turbofan engines with serial numbers as listed below (Warning: some engines may appear in more than one list):

List 1A: (First batch of CFM56-5 Engines with suspect gearshaft cluster spur assembly 31x71 teeth (line 2) in the accessory gearbox (AGB). Engines Serial Number (ESN): 731951, 731954, 731955, 731959, 731960, 731962, 731963,

731966, 731969 (See Service Bulletin CFM56-5 S/B 72-523 Revision 1).

List 1B: (Second batch of CFM56-5 engines with suspect gearshaft cluster spur assembly 31x71 teeth (line 2) in the accessory gearbox (AGB). ESN 731943 to 731948, 731952, 731953, 731956 to 731958, 731973. (See Service Bulletin CFM56-5

S/B 72-523 Revision 1).

List 2A: (First batch of CFM56-5B Engines with suspect gearshaft cluster spur assembly 31x71 teeth (line 2) in the accessory gearbox (AGB). ESN: 779316, 779318, 779322, 779323, 779330, 779332, 779339 (See Service Bulletin CFM56-5B

S/B 72-211 Revision 1).

List 2B: (Second batch of CFM56-5B Engines with suspect gearshaft cluster spur assembly 31x71 teeth (line 2) in the accessory gearbox(AGB). ESN 779307 to 779315, 779317, 779327 (See Service Bulletin CFM56-5B S/B 72-211 Revision 1).

List 3A: (First batch of CFM56-5C engines with suspect gearshaft cluster spur assembly 31x71 teeth (line 2) in the accessory gearbox (AGB) ESN: 741666, 741668, 741670 to 741674, 741676, 741677, 741680, 741682, 741684 (see Service

Bulletin CFM56-5C S/B 72-350 Revision 1).

List 3B: (Second batch of CFM56-5C engines with suspect gearshaft cluster spur assembly 31x71 teeth (line 2) in the accessory gearbox (AGB). ESN: 741653, 741655, 741665, 741667, 741669, 741675, 741678, 741679, 741681 (see Service

Bulletin CFM56-5C S/B 72-350 Revision 1).

Requirement: 1. For all engines in Lists 1A and 1B above, remove from service the gearshaft cluster spur assembly (31x71 teeth) in the AGB in accordance with the instructions of Service Bulletin CFM56-5 S/B 72-523 Revision 1.

2. For all engines in Lists 2A and 2B above, remove from service the gearshaft cluster spur assembly (31x 71 teeth) in the AGB in accordance with the instructions of Service Bulletin CFM56-5B S/B 72-211 Revision 1.

3. For all engines in Lists 3A and 3B above, remove from service the gearshaft cluster spur assembly (31x 71 teeth) in the AGB in accordance with the instructions of Service Bulletin CFM56-5C S/B 72-350 Revision 1.