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 name. 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 by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Canada, Ottawa, telephone 613 952-4357.

1/1 No.

CF-2014-32

Issue Date

8 September 2014

Number: CF-2014-32

ATA: 24 Type Certificate: A-234

Subject: Electrical Power – Chafing Between Wiring Harness and Hydraulic Line in Aft 

Equipment Bay

Effective: 22 September 2014

Applicability: Bombardier Inc. model BD-100-1A10 aeroplanes, serial numbers 20003 through 

20382, 20384 and 20386.

Compliance: Within 36 months from the effective date of this AD, unless already accomplished.

Background: There have been multiple in-service reports of chafing found on an electrical wiring 

harness in the aft equipment bay. An investigation determined that the chafing was 

attributed to contact between the wiring harness and a neighboring hydraulic line. This 

chafing could cause an electrical short circuit or lead to a malfunction of the flight control 

system, the engine indication system, or the hydraulic power control system; which could

adversely affect the continued safe operation and landing of the aeroplane.

This AD mandates the inspection, rectification as required, and modification of the wiring 

harness installation to ensure the correct wiring routing and a minimum clearance 

between the wire and the hydraulic line is maintained.

Corrective 

Actions:

Inspect, rectify as required, and modify the wiring harness installation in accordance with 

the Accomplishment Instructions in Bombardier Service Bulletin (SB) 100-24-24, Basic 

Issue, dated 6 June 2014, or later revisions approved by the Chief, Continuing 

Airworthiness, Transport Canada. 

If any damage found exceeds the repair limits specified in the Bombardier Standard 

Practices Manual, contact Bombardier Customer Support Engineering for an approved 

repair. The repair must specifically reference this AD.

Authorization: For the Minister of Transport, 

ORIGINAL SIGNED BY

Derek Ferguson

Chief, Continuing Airworthiness

Contact: Robert Farinas, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

613-996-9178 or e-mail AD-CN@tc.gc.ca or any Transport Canada Centre.

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 Communications 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)