Transport Transports Canada Canada TP 7245E



# AIRWORTHINESS DIRECTIVE

The following airworthiness directive (AD) may be applicable to an aircraft which our records indicate is registered in your na me. ADs are issued pursuant to Canadian Aviation Regulation (CAR) 521 Division X . Pursuant to CAR 605.84 and the further details of CAR Standard 625, Appendix H , the continuing airworthiness of a Canadian registered aircraft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD may invalidate the flight authorization of the aircraft. Alternative means of compliance shall be applied for in accordance with CAR 605.84 and the above-referenced Standard

. This AD has been issued b y the Continuin g Airworthiness Division ( AARDG ) , National Aircraft Certification Branch, Trans p ort Canada, Ottawa, tele p hone 613 952-4357.

Pursuant to CAR 202.51 the registered owner of a Canadian aircraft shall, within seven days, notify the Minister in writing of any change of his or her name or address. To request a change of address, contact the Civil Aviation Communicat ions Centre (AARC) at Place de Ville, Ottawa, Ontario K1A 0N8 , or 1-800-305-2059 , or www.tc.gc.ca/civilaviation/communications/centre/ address.asp
2 4-0022 ( 01-2005 ) 1/4 No

. CF-2003-18R2 Issue Date 28 September 2011

Number: CF- 2003-18R2 Subject: Life Limited Landing Gear Parts Not Serialized
Effective: 18 October 2011
Revision: Supersedes Airworthiness Directive CF-2003-18R1. Applicability: Bombardier Inc. Model CL-600-1A11 (Challenger 600), serial numbers 1004 through 1085 Compliance: As indicated below, unless already accomplished. Background: Certain landing gear parts t hat are listed in the aeroplane model Airworthiness Limitations Section, as safe life items with structural life limit s, could be rotable and may not have been serialized, making tracking di fficult. This directive mandates that such parts be serialized. This directive al so provides the procedure to determine the number of landings for those parts where the service history cannot be established. Since the release of the origi nal issue of this directive, Bombardier has revised the landing gear maintenance task intervals that affect the accessibility for adding serial numbers for certain landing gear parts. Revision 1 of this directive is therefore issued to extend the compliance time of certain landing gear parts. Revision 2 of this directive adds paragraph F to mandate serialization of two (2) additional landing gear parts.
Corrective Actions: A. Prior to reaching the life limit spec ified in the aeroplane model Airworthiness Limitations Section for the landing gear part affected, but no later than the earliest of the following:

- five (5) years from the effective date of the Original Issue of this directive (31 July 2003); or

- prior to the installation of a new landing gear part, or

- prior to the reinstallation of a used landing gear part. Add serial numbers and part numbers, when applicable, to the following parts, as directed in Bombardier Service Bulle tin (SB) 600-0710, Basic Issue, dated 31 May 2002, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. 1. Left and Right Main Landing Gear: (a) Lower Shock Strut Pin P/N 9081-1 (b) Upper Shock Strut Pin P/N 9082-1 or -3No. N ° CF-2003-18R2 2/4 (c) Hinge Pin P/N 200809670 (d) Inner Cylinder P/N 200810651 (e) Outer Cylinder P/N 200810702 (f) Left Main Fitting P/N 200922300 (g) Right Main Fitting P/N 200922301 (h) Wheel Lever P/N 200922302
2. Nose Landing Gear: (a) Sliding Tube/End Fitting Pin P/N 200811602 (b) Axle Fitting P/N 200811306, 200811307, or 200811308
B. Prior to reaching the life limit spec ified in the aeroplane model Airworthiness Limitations Section for the landing gear part affected, but no later than the earliest of the following:

- ten (10) years from the effective date of the Original Issue of this Directive (31 July 2003), or

- prior to the installation of a new landing gear part, or

- prior to the reinstallation of a used landing gear part. Add serial numbers and part numbers, when applicable, to the following parts, as directed in Bombardier SB 600-0710, dat ed 31 May 2002, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.
1. Left and Right Main Landing Gear: (a) Pintle Pin P/N 200809601 (b) Side Strut Retraction Ac tuator Eye Bolt P/N 9025-1
2. Nose Landing Gear: (a) Shock Strut Sliding Tube P/N 200811707 (b) Pivot Pins P/N 200811601 (c) Drag Brace Hinge Pin P/N 200814624 C. At the compliance times applicable in paragraph A and B, if the part does not have a serial number and the Cycles Si nce New (CSN) have not been tracked, the number of landings on such part are to be established as follows:
1. For parts listed under paragraph B. 1(b): Landings = 7511 + the act ual number of landings on the aeroplane since 6 April 1989.
2. For parts listed under paragraphs A. 1(c) and B. 1(a): Landings = 10 534 + the ac tual number of landings on the aer oplane since 12 October 1991.
3. For parts listed under paragraphs A. 1(a), A. 1(b), A. 1(f), A. 1(g), A. 1(h), A. 2(b), and B. 2(a), B. 2(b): Landings = 8900 + the ac tual number of landings on the aeroplane since 31 May 2001.No. N ° CF-2003-18R2 3/4

4. For parts listed under paragraphs A. 1(d), A. 1(e): Landings = 11 148 + the ac tual number of landings on the aeroplane since 6 May 1992.
5. For parts listed under paragraph B. 2(c): Landings = 10 647 + the ac tual number of landings on the aeroplane since 1 March 1996.
6. For parts listed under paragraph A. 2(a): Landings = 6704 + the ac tual number of landings on the aeroplane sinc e 20 October 1993.
D. The new number of landings assigned to these parts must be recorded in the aeroplane technical records.
E. Within 30 days after the effective date of the Original Issue of this Directive (31 July 2003) revise the Transport Canada approved maintenance schedule to incorporate the life limits for landing gear parts as introduced by the following Temporary Revision (TR) of the Cha llenger aeroplane Time Limits/Maintenance Check (TLMC) Manual:
TR Number Date TLMC Manual Manual Section 5-116 11 April 2002 PSP 605 5-10-10

F. Prior to reaching the life limit spec ified in the aeroplane model Airworthiness Limitations Section for the landing gear part affected, but no later than the earliest of the following:

- ten (10) years from the effect ive date of this directive, or

- prior to the installation of a new landing gear part, or

- prior to the reinstallation of a used landing gear part.
1. Add serial numbers and part numbers, when applicable, to the following parts, as directed in Bombardier SB 600-0710, Revision 03, dated 09 May 2011, or later revisions approved by t he Chief, Continuing Airworthiness, Transport Canada. Nose Landing Gear: (a) Main Fitting/Drag Stay Pin P/N 200811721 (b) Drag Brace Pivot Pin P/N 200814601 Addition of serial number and part number in accordance with Revision 02 of Bombardier SB 600-0710, dated 29 Oct ober 2007, also satisfies the requirement of paragraph F. 1( a) of this directive.
2. If the part does not have a serial number and the Cycles Since New (CSN) have not been tracked, the number of landings on such part are to be established as follows: Use Appendix 1 of Bombardier SB 600-0710, Revision 03, dated 09 May 2011, or later revision approved by t he Chief, Continuing Airworthiness, Transport Canada, to calculat e the number of landings.No. N ° CF-2003-18R2 4/4

Use of Bombardier Service Bulletin Information Sheet of Bombardier SB 600-0710, dated 06 July 2010, to calcul ate the number of landings also satisfies the requirements of par agraph F.2. of this directive.
3. Amend the aeroplane technical records to incorporate the new part numbers, serial numbers and landings assigned to these parts.
Authorization: For the Minister of Transport, Infrastructure and Communities 

### ORIGINAL SIGNED BY David Turnbull Director, National Aircraft Certification
Contact: Miss Helen Tsai, Continuing Airwor thiness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail CAWWEBFeedback@tc.gc.ca or any Transport Canada Centre.