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
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. 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 t he appropriate clamps required to provide positive separation between the AC feeder c ables 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 landi ng gear alternate extension hydraulic line, resulting in chafing of the AC feeder cabl e. The chafed and arcing AC feeder cable could puncture the adjacent hydraulic line. In co mbination with the use of the alternate extension system, this could result in an in-flight fire. This AD mandates the inspection, and rect ification 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 inspecti on for installation of clamps between the AC feeder cables and hydraulic line, and rect ify 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 wi th 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.