### 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) 593 . 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 invalidat e 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 by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Can ada, Ottawa, telephone 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 Communica tions 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

24-0022 (01-2005) 

### 1/1 No

. 

### CF-2009-23

Issue Date 

### 19 May 2009

Number: CF-2009-23



### Subject: Passenger Door Corrosion



### Effective: 08 June 2009



### Applicability: Bombardier Inc. Models: CL-600-2B19, Serial Numbers 7003 through 8089 CL-600-2C10, Serial Numbers 10003 through 10265 CL-600-2D15 and CL-600-2D24, Serial Numbers 15001 through 15173



### Compliance: Prior to 15000 hours air time, or within the next 5000 hours air time after the effective date of this
directive, whichever comes late r, unless already accomplished.


### Background: Several cases of corrosion in lower struct ural members of t he passenger door have been reported. It was subsequently det ermined that a drainage ramp (c onstructed from resin) had deteriorated with time and was retaining moisture. The ramp, therefore, r equires removal, both to prevent further corrosion and to allow full acce ss to the door structure during future scheduled inspections. Corrosion left undetected could eventually affect the structural integrity of the door and surrounding structure.



### Corrective

Actions: A. Applicable to CL-600-2B19 Airc raft, Serial Numbers 7003 through 8089:

Remove the lower passenger door ramp in acco rdance with Bombardier In-Service Modsum IS601R52110030, Revision A1, dated 24 April 2009, or later revisions approved by Transport

Canada.

Note: Accomplishment in accordance with Re vision A of Bombardier In-Service Modsum IS601R52110030, dated 5 July 2006, also m eets the intent of this directive.

B. Applicable to CL-600-2C10 Ai rcraft, Serial Numb ers 10003 through 10265 and CL600-2D15 and CL-600-2D24 Aircraft, Serial Numbers 15001 through 15173:

Remove the lower passenger door ramp in acco rdance with Bombardier In-Service Modsum IS67052110074, Revision A1, dated 24 April 2009, or later revisions approved by Transport

Canada.

Note: Accomplishment in accordance with Re vision A of Bombardier In-Service Modsum IS67052110074, dated 5 July 2006, also meets the intent of this directive.



### Authorization: For Minister of Transport, Infrastructure and Communities

Derek Ferguson Acting Chief, Continuing Airworthiness



### Contact: Mr. Richard Topham, Continuing Airworthi ness, Ottawa, telephone 613-952-4428, facsimile

613-996-9178 or e-mail richar d.topham@tc.gc.ca or any Transport Canada Centre.