AD/Cl-600/96 Stick Pusher Capstan Shaft (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-600/96 Stick Pusher Capstan Shaft 5/2008

Applicability:

Bombardier Inc. CL-600 aircraft:

CL-600-1A11 (CL-600) - Serial numbers 1004 through 1085

CL-600-2A12 (CL-601) - Serial numbers 3001 through 3066

CL-600-2B16 (CL-601-3A/3R) - Serial numbers 5001 through 5194

CL-600-2B16 (CL-604) - Serial numbers 5301 through 5665

Requirement:

1.    Amend all copies of the Aircraft Flight Manual (AFM) by incorporating the following applicable Temporary Revision (TR) and advise all flight crews on the changes introduced through the AFM TR.

CL-600-1A11 (CL-600):

PSP 600 DOT                 TR 600/24 dated Jan 30/07

PSP 600-1 DOT              TR 600-1/20 dated Jan 30/07

CL-600-2A12 (CL-601):

PSP 601-1A DOT           TR 601/28 dated Jan 30/07

PSP 601-1A-1 DOT        TR 601/16 dated Jan 30/07

PSP 601-1B DOT           TR 601/20 dated Jan 30/07

PSP 601-1B-1 DOT        TR 601/15 dated Jan 30/07

CL-600-2B16 (CL-601-3A/3R):

PSP 601A-1 DOT           TR 601/27 dated Jan 30/07

PSP 601A-1-1 DOT        TR 601/28 dated Jan 30/07

CL-600-2B16 (CL-604):

PSP 604-1 DOT              TR 604/22 dated Jan 30/07

This AD is applicable to all Challenger 600, 601, 601-3A/3R, and 604 models.  If the operator has an AFM that is not listed above, consult Bombardier Aerospace.

2.    Amend the Transport Canada approved maintenance schedule by incorporating new inspection task as introduced by the following applicable Temporary Revisions:

A/C Model	TLMC Section	Chapter 5 task No.	Status
CL-604	5-10-40	27-35-10-101	TR 5-2-32
CL-601 3A/3R	5-10-30	27-39-00-104	TR 5-239
CL-601	5-10-30	27-39-00-104	TR 5-226
Cl-600	5-10-30	27-39-00-104	TR 5-138

Note:  Transport Canada AD CF-2008-12 dated 8 February 2008 refers.

Compliance:

Within 30 days afters the effective date of this AD unless previously accomplished.

This Airworthiness Directive becomes effective on 8 May 2008.

Background:

There have been several Stick Pusher Capstan Shaft failures causing the dormant loss or severe degradation of the stick pusher function.  This AD is issued to revise the first flight of the day check of the stall protection system to detect a degradation of the stick pusher function.  It also introduces a new periodic maintenance task to check the structural integrity of the stick pusher capstan shaft.

David Punshon
Delegate of the Civil Aviation Safety Authority

6 March 2008