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-2012-31R1

Issue Date 

 17 September 2013 

Number: CF-2012-31R1 

Subject: Passenger Oxygen System – Incorrect Length of Oxygen Dispensing Unit 

Lanyards 

Effective: 21 December 2012 

Revision: Supersedes AD CF-2012-31, issued 7 December 2012. 

Applicability: Bombardier Inc. model BD-700-1A11 aeroplane with any of the Transport Canada 

Civil Aviation (TCCA) supplemental type certificates listed in Section 1.A, 

Effectivity, of the Bombardier Service Bulletin (SB) 700-1A11-35-009, Revision 2, 

dated 28 May 2013. 

Compliance: Within 750 hours air time or 15 months, whichever occurs first, from the effective 

date of the original issue of this AD dated 21 December 2012, unless already 

accomplished.

 Background: The aeroplane manufacturer has determined that the Oxygen Dispensing Unit (ODU) 

lanyards, in several locations throughout the aeroplane cabin, are excessively long. In an 

emergency situation where oxygen is required, it is possible that certain occupants may 

put their oxygen mask on without automatically activating the oxygen flow which could 

result in a fatal injury. 

The original issue of this AD mandated the replacement of the existing ODU lanyards 

with lanyards of the correct length. 

After the issuance of the original AD, the aeroplane manufacturer discovered that 

operators had not replaced all of the affected ODU lanyards due to misinterpretation of 

the accomplishment instructions of the Basic Issue of SB 700-1A11-35-009. Revision 1 of

this AD is issued to mandate the incorporation of the revised SB with clarified 

accomplishment instructions. 

Corrective 

Actions: 

Remove and replace all affected lanyards in accordance with the Accomplishment 

Instructions in Bombardier Service Bulletin (SB) 700-1A11-35-009, Revision 2,

dated 28 May 2013, or later revisions approved by the Chief, Continuing Airworthiness, 

Transport Canada. 

Compliance in accordance with the Basic Issue or Revision 1 of SB 700-1A11-35-009, 

dated 22 October 2012 and 15 March 2013, respectively, does not meet the 

requirement of 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.