Document ID: chunk:federal_register_of_legislation:F2006B08530:body:0
Version: federal_register_of_legislation:F2006B08530
Segment Type: other
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Character Range: 0–1148

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/CFM56/5 High Pressure Compressor 1-2 Spool 5/95

            Applicability: All CFM56-5-A Series engines incorporating No.3 bearing aft air/oil seal, P/N 1364M71G02.

             Requirement: 1. Inspect affected engines in accordance with CFM56-5 Service Bulletin 72-440, Revision 1.

             2. Replace No.3 bearing aft air/oil seal, P/N 1364M71G02, in accordance with CFM56-5 Service Bulletin 72-440, Revision 1.

            Note: DGAC AD 94-272(B)R1 also refers.

 Compliance: As detailed in the Requirement Document effective from 27 April 1995.

            Background:  It has been determined that a lack of running clearance may exist between the referenced stationary No.3 bearing aft air/oil seal and the stage 1 HPC disc bore. There is a potential for contact between the two parts in service which will result in rubbing/scratching of the disc bore forward corner. Such damage could lead to an uncontained failure of the disc.