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 ma y 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 by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Can ada, Ottawa, telephone (613) 952-4357.


### URGENT URGENT URGENT URGENT URGENT URGENT URGENT URGENT URGENT

TRANSPORT CANADA EMERGENCY AIRWORTHINESS DIRECTIVE PLEASE FORWARD IMMEDIATELY TO THE PERSON RESPONSIBLE FOR THE OPERATION AND MAINTENANCE OF YOUR AIRCRAFT

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 (AARA) at Place de Ville, Ottawa, Ontario K1A 0N8 , or 1-800-305-2059. 24-0022 (01-2001) This document is available on the web at : http://www.tc.gc.ca/aviation/ad/ad_e.htm 1/2 No

. CF-2010-36
Issue Date 18 October 2010

Number: CF- 2010-36

Subject: Main Landing Gear Door – Fairing Seal Interference

Effective: Upon receipt

Applicability: Bombardier Inc. Models:

CL-600-2C10, serial numbers 10003 and subsequent CL-600-2D15 and CL-600-2D24, serial number 15001 and subsequent

Compliance: As indicated below

Background: Two cases of main landing gear (MLG) fa ilure to fully extend have been reported. A n MLG failing to extend may result in an uns afe asymmetric landing configuration.

Preliminary investigation has shown that interference between the MLG door and the MLG fairing seal prevented the MLG door from opening.

This directive mandates the inspection and rectif ication, as required, of the MLG fairing and seal, MLG door, and adjacent structures.

Corrective Actions: A. Initially, use the following schedule:

1. For aeroplane serial numbers 10003 to 10313; 15001 to 15238; and 15240 to 15255, within 50 flight cycles from the effective date of this directive.

2. For all other aeroplane serial numbers, within 600 hours air time from the effective date of this directive.

B. Perform a detailed inspection of the MLG fairing and seal, MLG door and adjacent structures in accordance with Part A of the Accomplishment Instructions of Bombardier Alert Service Bulletin (ASB) A670BA-32-030, dated 18 October 2010, or later revisions approved by the Chief, C ontinuing Airworthiness, Transport Canada.

1. If no damage is found, proceed to paragraph C of this directive.No. N ° CF-2010-36 2/2

2. If damage to the MLG fairing seal is found, complete either Part B or Part C of the Accomplishment Instruct ions of the above ASB.

3. If Part C of the Accomplishment In structions of the above ASB is used for compliance with paragraph B.2. of this di rective, Part D of the Accomplishment Instructions of the above ASB must be completed if the MLG door is to be reinstalled.

4. For all other damage or missing parts /fasteners found, contact Bombardier Regional Aircraft Customer Response Center for disposition prior to further flight.

C. Subsequently, at intervals not to exceed 600 hours air time from previous inspection, repeat the inspection and rectificat ion detailed in Paragraph B above.

D. Within 30 days after Part B of the Abov e ASB was completed, forward the completed Data Sheet found in Appendix A of the abov e ASB to Bombardier Aerospace via the Bombardier Regional Aircraft Customer Response Center.

Authorization: For Minister of Transport, In frastructure and Communities

ORIGINAL SIGNED BY

Derek Ferguson Chief, Continuing Airworthiness

Contact: Miss Helen Tsai, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail CAWWEBFeedback@tc.gc.ca or any Transport Canada Centre.