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 na me. 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 ma y 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 b y the Continuin g Airworthiness Division ( AARDG ) , National Aircraft Certification Branch, Trans p ort Canada, Ottawa, tele p hone 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 Communicat ions Centre (AARC) at Place de Ville, Ottawa, Ontario K1A 0N8 , or 1-800-305-2059 , or www.tc.gc.ca/civilaviation/communications/centre/ addr ess.asp 2 4-0022 ( 01-2005 ) 1/2 No

. CF-2013-13 Issue Date 28 May 2013

Number: CF-2013-13 Subject: Rudder Controls - Yaw Damper Uncommanded Movement Effective: 11 June 2013 Applicability: Bombardier Inc. model CL-600-2B19, CL-600-2C10, CL-600-2D15, and CL-600-2D24 aeroplanes. Compliance: As indicated below, unless already accomplished. Background: There have been several reported incidents where Bombardier Regional Jet aeroplanes experienced in flight uncommanded rudder move ments. Investigation revealed that a failure of the voltage regulator inside the yaw damper actuator could lead to uncommanded yaw movement. If not corrected, this condition could lead to the loss of the aeroplane. This AD mandates the introduction of an em ergency procedure to the Aeroplane Flight Manual (AFM) to address the abov e mentioned unsafe condition.
Corrective Actions: A. Within 30 days from the effective dat e of this AD, accomplish the following: Amend the applicable AFM by incorporating the emergency procedure for uncommanded yaw motion:

Aeroplane Model AFM Procedure AFM Revision
CL-600-2B19 Emergency Procedures - Uncommanded Yaw Motion AFM Revision 61, dated April 02, 2013, or later revisions of this procedure approved by Transport Canada
CL-600-2C10 Emergency Procedures – Uncommanded Yaw Motion AFM Revision 11, dated February 14, 2013, or later revisions of this procedure approved by Transport Canada
CL-600-2D15 Emergency Procedures – Uncommanded Yaw Motion AFM Revision 7, dated February 07, 2013, or later revisions of this procedure approved by Transport Canada
CL-600-2D24 Emergency Procedures – Uncommanded Yaw Motion AFM Revision 7, dated February 07, 2013, or later revisions of this procedure approved by Transport CanadaNo. N ° CF-2013-13 2/2

B. Advise all flight crews of the changes introduced by AFM Revisions listed above.
Authorization: For the Minister of Transport, Infrastructure and Communities,
ORIGINAL SIGNED BY Derek Ferguson Chief, Continuing Airworthiness
Contact: Gordanko Jeremic, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail AD-CN@tc.gc.ca or any Transport Canada Centre.