1AD/DHC-8/63 Amdt 2 - Horizontal Stabiliser Skin Disbonding Follow-Up - 2

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

AIRWORTHINESS DIRECTIVE

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For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DHC-8/63 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 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-8/63

Amdt 2

Horizontal Stabiliser Skin Disbonding Follow-Up - 2

3/2000

Applicability: All DHC-8 Series aircraft which have horizontal stabilisers serial numbers CAP 003 through CAP 050 fitted.

Note: As the aircraft serial number may not be the same as that of the horizontal stabiliser, it may be necessary to check the data plate on the left side of the horizontal stabiliser and the component record cards to identify the stabiliser.

Requirement: 1. Provide bond integrity test samples as follows:

In accordance with instructions in Bombardier Repair Drawing (RD) RD8-55- 669 Issue 3, dated 17 March 1999, cut small samples from the affected bonded horizontal stabiliser skins as test coupons for bonding integrity testing.

b. Mark the cut samples in accordance with instructions in RD8-55-669 Issue 3.

c. Send the cut samples to Bombardier Aerospace at the address shown in RD8- 55-669 Issue 3, for testing.

d. Complete installation of the repair in accordance with RD8-55-669 Issue 3 to return aircraft to service.

2. Replace and/or repair the horizontal stabiliser, or;

3. Return the horizontal stabiliser to the normal bonding integrity inspection program in accordance with PSM 1-8-7.

Note: Transport Canada AD CF-99-15 R1 refers.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Compliance: 1. Unless already accomplished, provide samples to Bombardier for testing before 24 April 2000.