AD/DHC-1/25 Amdt 1 - Wing Flap Inner Hinge Bracket and Reinforcing Channel
1AD/DHC-1/25 Amdt 1 - Wing Flap Inner Hinge Bracket and Reinforcing Channel
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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De Havilland DHC-1 (Chipmunk) Series Aeroplanes
AD/DHC-1/25
Amdt 1
Wing Flap Inner Hinge Bracket and Reinforcing Channel
11/85
Applicability: All English production aircraft.
Document: British Aerospace TNS CT(C1) No. 166, Issue 2.
Compliance: 1. Inner Hinge Bracket: Within 100 hours time in service after 30 November 1973 and thereafter at each major inspection or at intervals not exceeding 600 hours time in service whichever occurs first.
- Reinforcing Channel:
Prior to the issue of the next Maintenance Release after 30 November 1985, and thereafter at each major inspection or at intervals not exceeding 300 hours time in service, whichever occurs first.
Note: Accomplishment of modification in accordance with Drawing No. RD.C1.WF.104 constitutes terminating action for the inspections in paragraph 3.2 of the TNS.
Background: Cracking has been reported in both of the subject flap components. It has been attributed to fatigue induced by repeated use of the footstep on the flap. The Inner Hinge Bracket inspections are unchanged from the previous issue of this Directive. However, the inspection of the Reinforcing Channel is a new requirement.