Document ID: chunk:federal_register_of_legislation:F2006B06076:body:0:p2
Version: federal_register_of_legislation:F2006B06076
Segment Type: other
Provision Reference: 
Character Range: 2913–4492

30 April 2000.

             (b) Post - SB 27-008 Configuration Flap System:

             Concurrent with the incorporation of SB 27-008 and thereafter at the intervals specified in the Pilatus PC12 Maintenance Manual, Chapter 05-10-20, Time Limited Inspection Requirements.

2.    Unless previously accomplished either during production or by retrofit action, within the next 600 hours time in service after the effective date of this Directive but no later than 30 June 2001, whichever occurs first.

3.    Concurrent with Requirement 2 of this Directive.

4.    No later than 31 December 2000.

            This Amendment becomes effective on 29 November 2000.

            Background:  Several flap actuators have been found with excessive backlash in the internal gear system. Excessive backlash may lead to rapid premature wear of the gear and in extreme cases to loss of actuator output. Internal failure of the worm gear could allow an actuator to turn freely. Detection of all potential failure modes by the flap control computer can not be assured.

            This amendment mandates a modification that improves the flap system and extends the repetitive inspection interval for the flap actuator backlash check. The amendment also requires certain FCWU's to be removed from service.

            The original issue of this Airworthiness Directive became effective on 9 December 1998.

 Eugene Paul Holzapfel
 Delegate of the Civil Aviation Safety Authority 22 November 2000

 The above AD is notified in the Commonwealth of Australia Gazette on 29 November 2000.