AD/CL-600/115 - Air Driven Generator Strut (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 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.

Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes AD/CL-600/115 Air Driven Generator Strut 8/2009

Applicability: Bombardier Inc. Model CL-600-2B16 (CL-604), Serial Numbers (S/N)s 5408 through 5665. Requirement: 1. Identification Check:

Check the part number of the installed Air Driven Generator (ADG):

a. If the part number (P/N) of the ADG is 604-90800-23 (Hamilton Sundstrand P/N 1711405), the strut wall thickness is within specification. No further action is required and compliance with this AD is complete.

b. If the P/N of the ADG is 604-90800-1, -17 or –19 (Hamilton Sundstrand P/N in the 761339 series), check the ADG S/N and proceed as follows:

i. If the S/N of the ADG is 2000 or higher, the strut wall thickness is within specification and only re-identification is required. Proceed to Requirement 6 of this AD.

ii. If the S/N of the ADG is in the range 0101 through 1999 and the symbol 24-3 is marked in the S/N block of the identification plate, the strut wall thickness is within specification and only re-identification is required. Proceed to Requirement 6 of this AD.