AD/CFM56/12 - Accessory and Transfer Gearbox Replacement (Cth)

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

CFM International Turbine Engines - CFM56 Series

AD/CFM56/12 Accessory and Transfer Gearbox Replacement

6/98 TX

Applicability: CFM International (CFMI) CFM56-3, 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 CFM56-3 engines with suspect starter gearshaft (line 5) in the accessory gearbox): Engine Serial Number (ESN): 858619 to 858622, 858624, 858627 to 858635, 858638, 858640, 858641, 858644, 858647, 858657 (See Service Bulletin CFM56-3/ -3B/ -3C S/B 72-863 revision 1).

List 1B: (Second batch of CFM56-3 engines with suspect starter gearshaft (line 5) in the accessory gearbox): ESN: 858639, 858642, 858643, 858646, 858648 to 858656, 858658, 858660, 858662 to 858665, 858670, 858671, 858673, 858676, 858678 (See Service Bulletin CFM56-3/ -3B/ -3C S/B 72-863 revision 1).

List 2A: (CFM56-3 Engines with suspect 26 teeth input bevel gear (line 1) in the transfer gear box). ESN: 858568, 858571, 858576, 858624, 858625, 858630 to 858639, 858641 to 858643, 858646 to 858651, 858654 to 858657, 858660 to 858662, 858665 to 858668, 858673, 858687, 858688, 858701, 722201 (See Service Bulletin CFM56-3/ -3B/ -3C S/B 72-865).

List 2B: (CFM56-3 Engines with suspect 27 teeth output bevel gear (line 2) in the transfer gear box): ESN: 858635 to 858637, 858642, 858643, 858646, 858648, 858656, 858657, 858662, 858663, 858665 to 858669, 858671 to 858677, 858679 to 858681, 858684, 858686, 858688, 858689, 858691, 858700 (See Service Bulletin CFM56-3/ -3B/ -3C S/B 72-865).