Transport Transports

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 TP 7245E

EMERGENCY 

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.

1/2 No.

CF-2014-27R1

Issue Date

29 August 2014

Number: CF-2014-27R1

ATA: 57 Type Certificate: A-131

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

Fitting

Effective: 29 August 2014

Revision: Supersedes AD CF-2014-27, issued 15 August 2014.

Applicability: Bombardier Inc. 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 three in-service reports on 604 Variant aeroplanes 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.

The original issue of AD CF-2013-39 mandated 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. 

After the issuance of AD CF-2013-39, there has been one reported incident on a 

604 Variant aeroplane where four fasteners were found fractured on the same flap 

hinge-box forward fitting. The investigation determined that the fasteners were incorrectly 

installed.

The original issue of this AD was issued to reduce the initial and repetitive inspection 

intervals previously mandated in AD CF-2013-39, and to impose replacement of the 

incorrectly oriented fasteners within 24 months. The CL-600-1A11, -2A12 and -2B16 

(601-3A/-3R Variant) aeroplanes are addressed through AD CF-2013-39R1.

Revision 1 of this AD is issued to clarify the requirements for the initial and repetitive 

inspections.

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)
No.

N° CF-2014-27R1 2/2

Corrective 

Actions:

A. Within 10 flight cycles from the effective date of the original issue of this AD

(15 August 2014), or within 100 flight cycles from the effective date of AD CF-2013-39

(20 December 2013), whichever occurs first, perform an initial 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

5301 through 5665 A604-57-006 Revision 3 19 August 2014

5701 through 5920 A605-57-004 Revision 3 19 August 2014

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 forward and aft fasteners at WS 76.50 & WS 127.25, on 

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

above-mentioned ASBs. 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.

Inspection and replacement of the fasteners, as required, in accordance with the 

Accomplishment Instructions in Bombardier ASB A604-57-006, Revision 1 or 

Revision 2 dated 26 September 2013 and 22 January 2014 respectively, or 

ASB A605-57-004, Revision 1 or Revision 2, dated 26 September 2013 or 

22 January 2014 respectively, as applicable, also meets the requirements of 

paragraph A of this AD.

B. Subsequently, repeat the DVI specified in paragraph A of this AD in accordance with 

the following schedule until paragraph C of this AD is accomplished:

1. Within 10 flight cycles from the effective date of the original issue of this AD 

(15 August 2014), or from the most recent inspection, whichever occurs later; and

2. Thereafter, at intervals not to exceed 10 flight cycles.

C. Within 24 months from the effective date of the original issue of this AD

(15 August 2014), remove and replace all forward and aft fasteners at 

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

Instructions in the applicable above-mentioned ASBs.

Replacement of all forward and aft fasteners at WS 76.50 & WS 127.25, on both 

wings, in accordance with the applicable above-mentioned ASBs, constitutes 

terminating action to this AD.

Replacement of the fasteners in accordance with the Accomplishment Instructions in 

Bombardier ASB A604-57-006, Revision 1 or Revision 2, dated 26 September 2013,

and 22 January 2014 respectively, or ASB A605-57-004, Revision 1 or Revision 2, 

dated 26 September 2013 or 22 January 2014 respectively, as applicable, also meets 

the requirements of paragraph C of this AD.

Authorization: For the Minister of Transport,

ORIGINAL SIGNED BY

Gordanko Jeremic

Acting 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.