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)

1/2 No.

CF-2013-39

Issue Date 

 6 December 2013 

Number: CF-2013-39 

Subject: Inboard Flap Hinge Box – Missing Fastener Head on Forward Attachment Fitting 

Effective: 20 December 2013 

Applicability: Bombardier Inc.: 

Model CL-600-1A11 (600) aeroplanes, serial numbers 1004 through 1085; 

Model CL-600-2A12 (601 Variant) aeroplanes, serial numbers 3001 through 3066; 

Model CL-600-2B16 (601-3A/3R Variant) aeroplanes, serial numbers 5001 

through 5194; 

Model CL-600-2B16 (604 Variant) aeroplanes, serial numbers 5301 through 5665 

and 5701 through 5920. 

Compliance: As indicated below, unless already accomplished. 

Background: There have been two in-service reports of a fractured fastener head, on the inboard flap 

hinge-box forward fitting at Wing Station (WS) 76.50, found during a routine maintenance 

inspection. Investigation revealed that the installation of these fasteners on the inboard 

flap hinge-box forward fittings at WS 76.50 and WS 127.25, on both wings, does not 

conform to the engineering drawings. Incorrect installation may result in premature failure 

of the fasteners attaching the inboard flap hinge-box forward fitting. Failure of the 

fasteners could lead to the detachment of the flap hinge box and consequently the 

detachment of the flap surface. The loss of a flap surface could adversely affect the 

continued safe operation of the aeroplane. 

This AD mandates a detailed visual inspection (DVI) of each inboard flap hinge-box 

forward fitting, on both wings, and rectification as required. Incorrectly oriented fasteners 

require repetitive inspections until the terminating action is accomplished. 

Corrective 

Actions: 

A. Within 100 flight cycles from the effective date of this AD, perform a DVI of each 

inboard flap fastener of the hinge-box forward fitting at WS 76.50 and WS 127.25, on 

both wings, in accordance with the Accomplishment Instructions of the applicable 

Bombardier Alert Service Bulletin (ASB) listed below, or later revisions approved by 

the Chief, Continuing Airworthiness, Transport Canada: 

Aeroplane Serial Numbers ASB Issue Date 

1004 through 1085 A600-0763 26-Sep 2013 

3001 through 3066 

5001 through 5194 

A601-0627 26-Sep 2013 

5301 through 5665 A604-57-006 Revision 1 26-Sep 2013 

5701 through 5920 A605-57-004 Revision 1 26-Sep 2013 
No.

N° CF-2013-39 2/2 

1. If all fasteners are found intact and correctly oriented, no further action is 

required; compliance with this AD is complete. 

2. If a fastener is found fractured, before further flight, remove and replace the 

fractured fastener and all incorrectly oriented forward and aft fasteners at 

WS 76.50 & WS 127.25, on both wings, in accordance with the applicable 

above-mentioned ASB. Compliance with this AD is complete. 

3. If a fastener is incorrectly oriented but intact, repeat the inspections required in 

paragraph B of this AD until the terminating action in paragraph C is 

accomplished. 

B. Subsequently, at intervals not to exceed 100 flight cycles, repeat the DVI specified in 

paragraph A of this AD until paragraph C of this AD is accomplished. 

C. Within 48 months from the effective date of this AD, remove and replace all 

incorrectly oriented forward and aft fasteners at WS 76.50 & WS 127.25, on both 

wings, in accordance with the applicable above-mentioned ASB. 

Replacement of all incorrectly oriented forward and aft fasteners at WS 76.50 & 

WS 127.25, on both wings, in accordance with the applicable above-mentioned ASB, 

constitutes terminating action to 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.