# 1+1 Transport Canada Transports Canada No. 

### CF-2014-27 Issue Date TP 7245E 1 

### 112 15 August 2014 

# EMERGENCY AIRWORTHINESS DIRECTIVE
The following aiiWorthiness directive (AD) may be applicable to an aircraft which our records indicate is registered in your name. ADs are issued pursuant to Canadian Awatron Re

_ gutatron (CAR) 521 Divislon X
. Pursuant to CAR 605.84 and the further details of CAR Standard 625, Appendix H, the continuing aiiWOrthiness of a Canadian reg1stered a1rcraft 1s cont1ngent upon compliance with all applicable ADs
. Failure to comply with the requirements of an AD may invalidate lhe flight authorization of the aircraft
. Alternative means of compliance shall be applied for 1n accordance with CAR 605.84 and the above-referenced Standard
. This AD has been issued by the Continuing AiiWorthiness Division (AARDG), National Aircraft Certification Branch , Transport Canada, Ottawa , telephone 613 952-4357
. 

### Number: ATA: Subject: Effective: Revision: Applicability: Compliance: Background: CF-2014-27 57 Type Certificate: A-131 Wings - Inboard Flap Hinge Box - Missing Fastener Head on Forward Attachment Fitting 15 August 2014 Supersedes AD CF-2013-39, issued 6 December 2013, for CL-600-2B16 (604 Variant) aeroplanes. Bombardier Inc. model CL-600-2B16 (604 Variant) aeroplanes, serial numbers 5301 through 5665 and 5701 through 5920. As indicated below, unless already accomplished. 

### 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. This AD is 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 -2816 (601-3AI-3R Variant) aeroplanes are addressed through AD CF-2013-39R1.

Pursuant to CAR 202.51 the
_ registered owner of a Canadian aircraft shall , within seven days, notify the Minister 1 nwnt1ng of any change of h1s or her name or address. 

# Canada To request a change of address, contact the Civil Aviation Communications Centre (AARC) at Place de Ville, Ottawa, Ontario K1A ON8, or 1 -800-305-2059, or www.tc.gc.ca/civllavlatlon/communicatlons/centre/ address.asp 24-0022 (01-2005)Corrective Actions: 

## ~~ **~** CF-2014-27 2/2 A. Within 10 flight cycles from the effective date of this AD , or within 100 flight cycles from the effective date of AD CF-2013-39 (20 December 2013) , whichever occurs first, 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 5301 through 5665 A604-57-006 Revision 2 22 January 2014 5701 through 5920 A605-57-004 Revision 2 22 January 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 , dated 26 September 2013, or ASB A605-57-004 , Revision 1 , dated 26 September 2013, as applicable, also meets the requirements of paragraph A ofthis AD. B
. Subsequently, at intervals not to exceed 10 flight cycles, repeat the DVI specified in paragraph A ofthis AD until paragraph C ofthis AD is accomplished. C
. Within 24 months from the effective date of this AD , 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 , dated 26 September 2013, or ASB A605-57-004 , Revision 1, dated 26 September 2013, as applicable, also meets the requirements of paragraph C ofth is AD. Authorization: For the Minister of Transport,

Contact: ORIGINAL SIGNED BY Derek Ferguson Chief, Continuing Airworth iness Robert Farinas , Continuing Airworthiness , Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail AD-CN @tc
.qc.ca or any Transport Canada Centre
.