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AD Number: CF-2014-39

Issue Date: 4 November 2014

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.

Number: CF-2014-39 Effective Date: 18 November 2014

ATA: 52 Type Certificate: A-177

Subject: Doors – Passenger Door Tensator Springs Failure

Replacement: Supersedes AD CF-2010-14, issued 13 May 2010.

Applicability: Bombardier Inc. model BD-700-1A10 and BD-700-1A11 aeroplanes, serial numbers

(S/Ns) 9002 and subsequent.

Compliance: As indicated below, unless already accomplished.

Background: Following the issuance of AD CF-2010-14, additional qualification testing of the 

passenger door tensator spring, Part Number (P/N) GS321-0580-1, determined that the 

tensator springs could be susceptible to failure prior to reaching the life limit mandated by 

AD CF-2010-14. 

In addition, there have been in-service reports of passenger door tensator spring failures. 

Investigation determined that the material used to manufacture the tensator springs were 

improperly heat treated.

The passenger door assembly is installed with four tensator springs that assist the door 

actuator in opening and closing the door. In-service experience has shown that a failed 

tensator spring could uncoil and foul up the rotating tensator spools, resulting in the 

inability to open the main passenger door. The inability to open the main passenger door 

could impede evacuation in the event of an emergency.

This AD mandates the revision to the approved maintenance schedule to reduce the 

repetitive discard task interval and mandates the replacement of non-conforming 

tensator springs.

Corrective Actions:

Part I – Life Limit Revision: Applicable to all aeroplanes

Within 30 days from the effective date of this AD, amend the Transport Canada approved 

maintenance schedule by revising the repetitive discard task, Task Number 

52-11-41-101, for the passenger door tensator spring, P/N GS321-0580-1. This task was 

revised by the following Temporary Revisions (TRs) to the applicable BD-700 

Time Limits/Maintenance Checks (TLMC), Part 2, Section 5-10-11:

Aeroplane Model TLMC Manual Number TR Number Date

BD-700-1A10

GL 700 TLMC TR 5-2-44 4 June 2014

GL XRS TLMC TR 5-2-7 4 June 2014

GL 6000 TLMC TR 5-2-9 4 June 2014

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. 

For all changes to your mailing address, contact your TC Regional Aircraft Registration Office at 1-800-305-2059,

option 1 for English, 2 for Aircraft Registration and then select the appropriate region.

24-0022 (01-2005)
CF-2014-39 2 of 2

BD-700-1A11

GL 5000 TLMC TR 5-2-13 4 June 2014

GL 5000 GVFD TLMC TR 5-2-9 4 June 2014

The above-referenced TLMC TRs contain a phase-in schedule for aeroplanes with 

passenger door tensator springs that have exceeded 550 flight cycles.

Compliance with superseding TRs or later revisions of the above-mentioned TLMC 

Manual approved by Transport Canada also meets the requirements of Part I of this AD.

Part II – Replacement of Non-Conforming Passenger Door Tensator Springs: 

Applicable to aeroplanes with S/Ns included in Section 1.A, Effectivity, of 

Bombardier Service Bulletin (SBs) 700-52-046 dated 4 October 2013, or SB 700-

1A11-52-023 dated 4 October 2013

Within 15 months after the effective date of this AD, but prior to exceeding the applicable 

life limit of the passenger tensator spring specified in Part I of this AD, replace the 

passenger door tensator springs, P/N GS321-0580-1. Approved instructions for the 

replacement of the passenger doors tensator springs are contained in the applicable 

Bombardier SBs shown in the table below, or later revisions approved by the Chief, 

Continuing Airworthiness, Transport Canada:

Aeroplane Model Bombardier SB Date

BD-700-1A10 700-52-046 4 October 2013

BD-700-1A11 700-1A11-52-023 4 October 2013

For aeroplanes with S/Ns 9278 through 9360, previous replacement of the passenger 

door tensator springs meets the requirements of Part II of this AD. Follow the TLMC, as 

revised in Part I of this AD for subsequent spring replacements.

For all other applicable aeroplanes, accomplishment of the TLMC discard task as revised 

in Part I of this AD after the effective date of this AD meets the requirements of Part II of 

this AD.

Authorization: For the Minister of Transport, 

ORIGINAL SIGNED BY

Derek Ferguson

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.