Transport Transports Canada Canada TP 7245E



# EMERGENCY **AIRWORTHINESS DIRECTIVE**

The following airworthiness directive (AD) may be applicable to an aircraft which our records indicate is registered i n 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 c ompliance 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 Stand ard

. This AD has been issued by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport C anada, Ottawa, telephone 613 952

- 4357. 1 / 2 No

. CF

- 2014

- 27 R1 Issue D ate 29 August 2014

Number: CF

- 2014

- 27 R1

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 201 4.
Applicability: B ombardier Inc. m odel 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 t hree 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 fit tings 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 cou ld 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.

Th e original issue of AD CF

- 2013

- 39 mandate d a detailed vi sual 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

- 201 3

- 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.

T h e origina l issue of th is 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

. T he CL

- 600

- 1A11,

- 2A12 and

- 2B16 (601

- 3A /

- 3R Var iant) aeroplanes are addressed through AD CF

- 2013

- 39R1

. Revision 1 of this AD is issued to clarify the requirement s for the initial and repetitive inspections.

Pursuant to CAR 202.51 the registered owner of a Canadian aircraft shall, within sev en 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

- 27 R1 2 / 2

Corrective Actions: A. Within 10 flight cycles from the effective date of th e original issue of th is AD (15 August 2014)
, or within 100 flight cycles from the effective date of AD CF

- 2013

- 3 9 (20 December 2013) , whichever occurs first
, perform a n initial DVI of each inboard flap fastener of the hinge

- box forward fitting at WS 76.50 and WS 127.25, on b oth 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 D ate 5301 through 5665 A604

- 57

- 006 Revision 3 19 August 201 4 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 faste ner 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 ASB s . Co mpliance 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 req uired, 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 fli ght cycles from the effective date of the original issue of this AD (15 August 2014), or from the most recent ins pection, 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 ASB s

. Replacement of all forward and aft fasteners at WS 76.50 & WS 127.25, on both wings, in accordance with the applicable above

- mentioned ASB s , constitutes terminating action to this AD.

R eplacement 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 o f this AD.

Authorization: For the Minister of Transport,

ORIGINAL SIGN ED 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.