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-2014-08

Issue Date 

 10 February 2014 

Number: CF-2014-08 

Subject: Forward Translating Door — Loose Bolts 

Effective: 24 February 2014 

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

through 4411. 

Compliance: As indicated below, unless already accomplished. 

Background: There was one in-service report where the bolts securing the translating door crank assembly 

to the outside handle shaft were found loose. It was also found on another translating door 

that sealant was missing on these bolts. If both bolts become loose or fall out after the door is 

closed and locked, the door cannot be opened from inside or outside. 

The aft entry translating door and aft service translating door are classified as emergency 

exits. The inability to open an emergency exit could impede evacuation in the event of an 

emergency. 

This AD mandates the inspection of the translating door crank assemblies for loose bolts, as 

well as appropriate rectification. 

Corrective 

Actions: 

Part I - Inspection 

Within 600 hours air time or 100 days, whichever occurs first, from the effective date of this 

AD, perform a detailed visual inspection of the translating door crank assembly bolts in 

accordance with Part A of the Accomplishment Instructions of Bombardier Service Bulletin 

(SB) 84-52-75, Revision A, dated 11 July 2013, or later revisions approved by the Chief, 

Continuing Airworthiness, Transport Canada. 

A. If there is any indication of a loose bolt, complete Part II of this AD before further flight. 

B. If there is no indication of a loose bolt, proceed to Part II of this AD. 

Part II - Rectification 

Within 6000 hours air time or 3 years, whichever occurs first, from the effective date of this 

AD, remove and reinstall the translating door crank assembly bolts in accordance with Part B 

of the Accomplishment Instructions of the above-mentioned SB. 

Previous accomplishment of Bombardier SB 84-52-75, Initial Issue, dated 27 July 2012, also 

meets the requirements of Part II of this AD. 

Part II of this AD constitutes terminating action to this AD. Part I of this AD is no longer 

required after accomplishment 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.