AD/CL-600/69 Amdt 1 - Horizontal Stabiliser Trim - Uncommanded Movement (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CL-600/69 and issues the following 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-600/69 Amdt 1 Horizontal Stabiliser Trim - Uncommanded Movement 13/2006 DM

Applicability: Model CL-600-2B16 (CL-604), serial number 5301 through 5665. Requirement: 1. If not previously accomplished, amend the Aircraft Flight Manual (AFM) by inserting Temporary Revision (TR) 604/21-1 dated 3 October 2006, or later approved changes to this TR. TR 604/21 dated 1 August 2006, which was installed under the original issue of this Airworthiness Directive, should be removed. 2. Install circuit breaker quick identifier collars on the horizontal stabiliser trim control unit (HSTCU) circuit breakers in accordance with Bombardier Alert Service Bulletin (ASB) A604-27-029 dated 28 September 2006, or later revision approved by the Chief, Continuing Airworthiness, Transport Canada Civil Aviation (TCCA) 3. Ensure all flight crew are aware that on the flight crew's first flight of the day, they are required to: a. Review the location of the STAB CH1 HSTCU and STAB CH2 HSTCU circuit breakers, and b. Check the stabilizer trim system as detailed in CL-604 AFM "Normal Procedures" section titled "Flight Controls Trim Systems, Before Flight - First Flight of the Day". This may be accomplished by placing a copy of this Amendment in the AFM "Normal Procedures". 4. Install HSTCU, part number (P/N) 601R92301-15, (Vendor P/N 7060-10) or a higher Mod Number, in accordance with ASB A604-27-029 dated 28 September 2006, or later revision approved by the Chief, Continuing Airworthiness, TCCA. Following installation of HSTCU Vendor P/N -10 or higher, it is permissible to remove the quick identification circuit breaker collars installed under Requirement 1 of this Amendment