COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Pratt and Whitney Turbine Engines - JT9D Series
AD/JT9D/12
Amdt 1
Fifteenth Stage Compressor Discs 9/89
JT9D-3A, -7, -7A, -7H, -7AH, -7A(SP), -7F, -7J, -20, -20J.
Inspect 15th stage compressor discs P/N 658615 and 672915 in accordance with the requirements of PWA SB No.4908 Rev.1.
As detailed in the Requirement document.
This Directive has been amended to reflect the manufacturers latest revision to S.B.
4908. The revision, in part, reduces the initial inspection requirement from 6,500 cycles to 3,500 cycles.