COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
General Electric Turbine Engines - CF6 Series
AD/CF6/26 Stage 11 to 13 Compressor Spool Inspection 12/93
CF6-45/-50 series.
Action in accordance with the technical requirements of FAA AD 93-13-10.
GE Service Bulletin No 72-1006 Revision 1 dated 14 November 1991 refers.
As specified in the FAA AD with effectivity commencing 11 November 1993.
There have been reports of fatigue cracking in the 12th stage compressor disc.
Consequently, there is need for a one time inspection for cracking and measurement of the stage 12 compressor disc web-to-rim transition area of the stage 11-13 compressor spool. Depending on the results, the items are then to be replaced, reidentified and relifed.