Document ID: chunk:federal_register_of_legislation:F2006B11018:body:0
Version: federal_register_of_legislation:F2006B11018
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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/25 Fan Blade Inspection/Revised Shroud Angle 8/94

 Applicability: All JT9D-7R4 Series engines.

             Requirement: 1. Inspect fan blade leading edges in accordance with Pratt and Whitney Service Bulletin 72-255 Revision 5.

             2. Incorporate fan blades featuring a revised shroud angle in accordance with Pratt and Whitney Service Bulletin 72-309 Revision 10.

            Incorporation of Pratt and Whitney Service Bulletin 72-309 Rev 10 constitutes terminating action for the repetitive inspection per Requirement 1.

            Note: FAA AD 94-08-06 also refers.

             Compliance: 1. Initially within 200 cycles in service from 21 July 1994, and thereafter, at intervals not to exceed 200 cycles.

            2. No later than 21 July 1996.

            Background:  This Directive is issued to prevent fan blade failures that have been attributed to a combination of high vibratory stresses and foreign object damage.