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.

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)

1/1 No.

CF-2013-16

Issue Date 

 14 June 2013 

Number: CF-2013-16 

Subject: AC Feeder Cables not Clamped to Hydraulic Lines 

Effective: 27 June 2013 

Applicability: Bombardier Inc. DHC-8 models 400, 401 and 402 aeroplanes, serial numbers 4001 

through 4347. 

Compliance: As indicated below, unless already accomplished. 

Background: During production checks, it was found that the appropriate clamps required to provide 

positive separation between the AC feeder cables and the hydraulic line of the landing 

gear alternate extension were omitted. The AC feeder cable could sag and be in direct 

contact with the swage fitting of the landing gear alternate extension hydraulic line,

resulting in chafing of the AC feeder cable. The chafed and arcing AC feeder cable could 

puncture the adjacent hydraulic line. In combination with the use of the alternate 

extension system, this could result in an in-flight fire. 

This AD mandates the inspection, and rectification as necessary, for proper clamp 

installation. 

Corrective 

Actions: 

Within 6000 hours air time or 36 months, whichever occurs first, from the effective date of 

this AD, perform a general visual inspection for installation of clamps between the 

AC feeder cables and hydraulic line, and rectify as required, in accordance with the 

Accomplishment Instructions of Bombardier Service Bulletin 84-24-53, Revision A, dated 

16 May 2013, or later revisions approved by the Chief, Continuing Airworthiness, 

Transport Canada. 

Inspection and rectification in accordance with Bombardier SB 84-24-53, Initial Issue, 

dated 11 May 2012 also meet the requirements of this AD. 

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

ORIGINAL SIGNED BY 

Robin Lau 

Acting Chief, Continuing Airworthiness 

Contact: Helen Tsai, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

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