AD/JT9D/30 - First Stage High Pressure Turbine Disk
1AD/JT9D/30 - First Stage High Pressure Turbine Disk
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Image unavailable in extracted text Pratt and Whitney Turbine Engines - JT9D Series
AD/JT9D/30 First Stage High Pressure Turbine Disk 6/98
Applicability: Pratt and Whitney JT9D series engines incorporating high pressure turbine disks specified in FAA AD 97-25-10.
Requirement: Inspect affected high pressure turbine disks in accordance with the technical requirements of FAA AD 97-25-10.
Note: FAA AD 97-25-10 supersedes FAA AD 91-04-10.
Compliance: Unless previously accomplished, as detailed in the Requirement document.
This airworthiness directive becomes effective on 21 May 1998.
Background: This Directive is prompted by reports of cracks in certain high pressure turbine disks at cooling hole and tie bolt hole locations.