COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
De Havilland DHC-1 (Chipmunk) Series Aeroplanes
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD)DHC-1/22 Amdt 1 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
AD/DHC-1/22
Amdt 2
Tailplane Structure 7/2000
Applicability: All English production aircraft which have not been modified in accordance with a scheme approved by the Authority.
Requirement: Inspect the tailplane upper and lower spar flanges in accordance with British Aerospace TNS CT(C1) No. 157, Issue 3, Amendment dated 28 May 1986.
Compliance: Initially inspect no later than the next major inspection after 31 December 1985.
Repeat the inspections of paragraph 8 of the TNS at intervals not exceeding 6 years, unless the aircraft is operated on a Role Factor of 4 (see TNS CT(C1) No. 138), in which case the inspection interval shall not exceed 3 years.
This Amendment becomes effective on 13 July 2000.
Background: This directive requires repetitive radiographic inspection of the tailplane upper and lower spar flanges at the fuselage attachment brackets. Some aircraft have been modified to incorporate a locally developed reinforcement kit. This amendment excludes modified aircraft from the requirement. The opportunity has also been taken to update the TNS reference. No additional work is required as a result of this amendment.
The initial issue of this directive became effective on 29 October 1971. Amendment 1 became effective on 30 November 1985.
Bernard Malcolm Hole
Delegate of the Civil Aviation Safety Authority 31 May 2000
The above AD is notified in the Commonwealth of Australia Gazette on 14 June 2000.