Document ID: chunk:federal_register_of_legislation:F2006B09561:body:0:p2
Version: federal_register_of_legislation:F2006B09561
Segment Type: other
Provision Reference: 
Character Range: 3043–6235

to the requirements of, the appropriate Pratt and Whitney Canada Service Bulletin detailing Pratt and Whitney Canada PT6A operating time between overhaul and hot section inspection frequency; or

                 (b)     At periods not to exceed 5,000 hours time in service, subject to compliance with the maintenance requirements detailed in Appendix A of this Directive; or

                 (c)     As detailed in an approved system of maintenance.

              1.4    Pratt and Whitney Canada PT6A series engines installed in aircraft conducting aerial agricultural operations or fire fighting operations:

                 (a)     PT6A series engines shall be overhauled at periods as listed in, and subject to the requirements of, the appropriate Pratt and Whitney Canada Service Bulletin detailing Pratt and Whitney Canada PT6A operating time between overhaul and hot section inspection frequency; or

                 (b)     In accordance with an engine on-condition program having regard to that detailed in Appendix B of this Directive; or

 (c)      As detailed in an approved system of maintenance. Compliance: Not later than 1 January 2005.
            This Amendment becomes effective on 30 September 2004.

            Background: This Directive is issued to require turbine engines to be overhauled or inspected at specified intervals. The Directive addresses the engine certification requirement to publish instructions for the continued airworthiness of a type-certificated engine. In addition to listing the manufacturer's published TBO or inspection periods, the Directive also provides unique CASA initiated options for certain turbine engines.

            This amendment deletes the previous requirement for repair and overhaul of turbine engines because these requirements are already reflected in the regulations. This amendment also provides an option to use PWC's WebECTM option to conduct engine condition trend monitoring.

 Gary J Carr
 Delegate of the Civil Aviation Safety Authority 19 August 2004

 The above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.

AD/ENG/5
 Amdt 9

 PT6A Enhanced Maintenance Program Appendix A

REQUIREMENTS

 The PT6A engine maintenance program shall be carried out in accordance with approved maintenance data and detailed in a system of maintenance approved under Civil Aviation Regulation (CAR 1988) 42M. The system of maintenance shall include, but need not be limited to, the following requirements.

     1. PT6A engines not previously maintained in accordance with a maintenance program reflecting the intent of the maintenance requirements detailed in this Appendix and with engine hours in service greater than 75% of the Pratt and Whitney Canada published Time Between Overhaul (TBO) period at the time of introduction, shall be subject to a pro-rata TBO period based on the Pratt and Whitney Canada published TBO period; and

2.         The engine shall be on an Engine Condition Trend Monitoring (ECTM) program, including data collection, analysis and follow up actions. This program shall be in accordance with the Pratt and Whitney Canada ECTM