Transport Transports Canada Canada TP 7245E



# EMERGENCY **AIRWORTHINESS DIRECTIVE**

The following airworthiness directive (AD) may be applicable to an aircraft which our records i ndicate 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 aircra ft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD may invalidate th e 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 C anada, Ottawa, telephone 613 952

- 4357. 1 / 2 No

. CF

- 201 4

- 19
Issue Date 20 June 2014

Number: CF

- 201 4

- 19

ATA: 78 Type Certificate: A

- 131

Subject: Engine Exhaust

- Engine Thrust Reverser Actuator Attachment Structure Failure

Effective Date : 20 June 2014

Applicability: Bombardier Inc. model CL

- 600

- 1A11 a eroplane s, s erial numbers 1004 to 1 085

. Compliance: As indicated below, unless already accomplished.

Background: There have been two reported incidents of partial deployment of an engine thrust reverser in

- flight, caused by a failure of the translating sleeve at the thrust reverser actuat or attach ment points. Inspection of the same area on some other thrust reversers revealed cracks emanating from the holes under the nut plates.

In both incidents

, the affected aeroplane landed safely without any noticeable controllability issues, however s tructural failure of thrust reverser actuator attachment points result ing in thrust reverser deployment or dislodgment in flight is a safety hazard warranting an immediate mitigating action.

To help in mitigating any immediate safety hazard, Bombardier Inc

. has revised the Aircraft Flight Manual (AFM) t h rough Temporary Revisions (TR) 600/ 29, 600/30, 600

- 1/24 and 600

- 1/26, to prohibit the thrust reverser operation on affected aeroplanes. Additionally

, as an interim corrective action

, Bombardier Inc. has issu ed alert service bulletin ( A SB ) A600

- 0769 requiring an inspection and/or a mechanical lock out of the thrust reverser to prevent it from moving out of forward thrust mode.

This AD is issued to mandate the incorporation of revised AFM procedures per TR 600/29, 600 /30, 600

- 1/24 and 600

- 1/26 and compliance with A SB A600

- 0769 for all affected CL

- 600

- 1A11 aeroplanes.

Corrective Actions: Part 1

- AFM Revision

Within 24 h ours of the effective date of this AD , amend the AFM for the affected CL

- 600

- 1A11 a erop lanes by incorporating the procedural changes introduced through TR 60 0 / 30

, 600

- 1/26 dated 14 June 2014 and TR 600/29 , 600

- 1/24 dated 20 June 2014 , as applicable, or later revisions of these procedures as approved by Transport Canada

.

Pursuant to CAR 202.51 the registered owner of a Canadian air craft 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

- 20 14

- 19 2 / 2

Part 2

- Inspection F or Cracks

Within 25 flight cycles or 90 days , whichever occurs first, from the effective date of this AD

, comply with Part 2 paragraph A or Part 2 paragraph B of this AD.

A

- Inspection

I nspect both engine thrust reversers on the affected aeroplanes and perform repeat inspection s every 100 flight c ycles

, in accordance with the Part A instructions of A SB A600

- 0769 dated 19 June 2014 or later revision approved by the Chief, Continuing Airworthiness, Transport Canada. If any c rack is found, comply with paragraph B below prior to next flight.

B

- Modification Of Thrust R everser Modify the thrust rever sers on both engines of the affected aeroplanes in accordance with Part B of A SB A600

- 0769 dated 19 June 2014 or later revision approved by the Chief, Continuing Airworthiness, Transport Canada. Compliance with Part 2 paragraph B of this AD is the termina ting action for the Part 2 paragraph A requirement s of this AD

. Part 3

Within 24 months from the compliance with Part 2 paragraph B of this AD, repair /modify the affected thrust reverser s in accordance with methods developed by Bombardier Inc. and approved by the Chi ef Continuing Airworthiness, Transport Canada.

Authorization: For the Minister of Transport,

ORIGINAL SIGNED BY

Derek Ferguson Chief, Continuing Airworthiness

Contact: A K Durrani , Continuing Airworthiness, Ottawa, telephone 613

- 952

- 4357, facsimile 613

- 996

- 9178 or e

- mail AD

- CN@tc.gc.ca or any Transport Canada Centre.