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-600/102 Wing Anti-ice Piccolo Ducts 9/2008 Applicability: Bombardier Inc. Models: CL-600-1A11 - Serial Numbers (S/N) 1004 through 1085. CL-600-2A12 - S/N 3001 through S/N 3066. CL-600-2B16 - S/N 5001 through S/N 5194. CL-600-2B16 - S/N 5301 through S/N 5635. Requirement: 1. Applicable to: CL-600-1A11 S/N 1004 through S/N 1085. CL-600-2A12 S/N 3001 through S/N 3066. CL-600-2B16 Serial Numbers 5001 through 5194 and 5301 through 5635. (a) Amend the AFM Normal and Abnormal Procedures by inserting the applicable Temporary Revision (TR) or Revision listed below, or later approved changes to the applicable TR or Revision: PSP 600 (DOT), TR 600/23 dated 16 August 2006 PSP 600-1 (DOT), TR 600-1/19 dated 16 August 2006 PSP 601-1A, TR 601/27 dated 16 August 2006 PSP 601-1A-1, TR 601/15 dated 16 August 2006 PSP 601-1B, TR 601/19 dated 16 August 2006 PSP 601-1B-1, TR 601/14 dated 16 August 2006 PSP 601A-1, TR 601/26 dated 16 August 2006 PSP 601A-1-1, TR 601/27 dated 16 August 2006 PSP 604-1, TR 604/20 dated 17 April 2006 PSP 604-1, Revision 66 dated 1 February 2007 (b) Advise all flight crew of the changes introduced in the applicable AFM TR or Revision. 2. Applicable to: CL-600-1A11 Serial Numbers 1004 through 1085. CL-600-2A12 Serial Numbers 3001 through 3066. CL-600-2B16 Serial Numbers 5001 through 5194 and 5301 through 5468. (a) Check the aircraft maintenance records to determine if any anti-ice piccolo ducts or complete leading edge sections have been replaced since 1 August 2000. The aircraft maintenance records up to the accomplishment date of this AD are to be checked, not just to the original release date of the applicable Service Bulletin (SB) (i.e. 30 November 2006) as stated in the Service Bulletins listed in paragraph B.2 below. (b) If any anti-ice piccolo ducts or complete leading edge sections have been replaced since 1 August 2000, check the serial numbers of the replaced ducts and replace them, as determined necessary, in accordance with the Accomplishment Instructions in the applicable Bombardier Service Bulletin listed below, or later revision approved by the Chief, Continuing Airworthiness, Transport Canada. Model Service Bulletin Date CL-600-1A11 (CL-600) SB 600-0734 30 November 2006 CL-600-2A12 (CL-601) SB 601-0585 30 November 2006 CL-600-2B16 (CL-601-3A/3R) SB 601-0585 30 November 2006 Cl-600-2B16 (CL-604) SB 604-30-003 or 30 November 2006 SB 604-30-003, Revision 1 21 January 2008 3. Applicable to: CL-600-2B16, Serial Numbers 5469 through 5635. Visually check the anti-ice piccolo ducts and replace them, as determined necessary, in accordance with the Accomplishment Instructions in Bombardier Service Bulletin 604-30-003, basic issue dated 30 November 2006, Revision 1, dated 21 January 2008, or later revision approved by the Chief, Continuing Airworthiness, Transport Canada. 4. Applicable to: CL-600-1A11 Serial Numbers 1004 through 1085. CL-600-2A12 Serial Numbers 3001 through 3066. CL-600-2B16 Serial Numbers 5001 through 5194. CL-600-2B16 Serial Numbers 5301 through 5635. No replacement/spare anti-ice piccolo duct with a part number/serial number listed in paragraph 2.C of any of the following Bombardier Service Bulletins, or later revision approved by the Chief, Continuing Airworthiness, Transport Canada, is permitted to be installed on any aircraft. Model Service Bulletin Date CL-600-1A11 (CL-600) SB 600-0734 30 November 2006 CL-600-2A12 (CL-601) SB 601-0585 30 November 2006 CL-600-2B16 (CL-601-3A/3R) SB 601-0585 30 November 2006 CL-600-2B16 (CL-604) SB 604-30-003 Revision 1 21 January 2008 Note: Transport Canada AD CF-2008-18 dated 9 May 2008 refers. Compliance: For Requirement 1: Within 30 days after the effective date of this AD, unless previously accomplished. For Requirements 2 and 3: Within 2000 flight hours or 60 calendar months after the effective date of this AD, whichever comes first. For Requirement 4: From the effective date of this AD. This Airworthiness Directive becomes effective on 28 August 2008. Background: There have been several cases of wing anti-ice piccolo duct failure reported on CL-600-2B19 (CRJ) aircraft. Although there have been no failures reported on Challenger aircraft, similar ducts are installed on the above Challenger models. Upon investigation, it has been determined that ducts manufactured since June 2000, and installed since 1 August 2000, are susceptible to cracking due to the process used to drill the holes in the ducts. These ducts were installed on CL-600-2B16 aircraft, serial numbers 5469 through 5635 in production, but may also have been installed as replacements on CL-600-1A11, CL-600-2A12 and other CL-600-2B16 aircraft. Cracking of the wing anti-ice piccolo ducts could result in air leakage, with an adverse effect on the anti-ice air distribution pattern and a possible unannunciated insufficient heat condition. As a result, the aeroplane flight manual (AFM) instructions have been revised to provide proper annunciation of an insufficient heat condition, utilizing existing messages and indications, with instructions, to the pilot, to leave icing conditions if sufficient heat cannot be achieved or maintained. This AD mandates the amendment of the AFM procedures, in addition to checking the part numbers and serial numbers of the installed wing anti-ice piccolo ducts and replacing them as necessary. James Coyne Delegate of the Civil Aviation Safety Authority 16 July 2008