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 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 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/ address.asp 2 4-0022 ( 01-2005 ) 1/2 No

. CF-2011-45 Issue Date 19 December 2011

Number: CF-2011-45 Subject: Horizontal Stabilizer Trim Actuator Attachment Pins and Trunnions Not Serialized Effective: 9 January 2012 Applicability: All Bombardier Inc. Model CL-600-2B19 Aeroplanes. Compliance: As indicated below, unless already accomplished. Background: During a review of the Horizontal Stabilizer Trim Actuator (HSTA) system, it was discovered that the safe life limits and t he inspection requirements for the HSTA attachment pins and trunnions were not listed in the Airworthiness Limitations Section of the Instructions for Continued Airworthine ss. Also, the HSTA attachment pins and trunnions were not serialized making it impossibl e to keep accurate records of the life of these parts. Failure of these pins and trunnions will lead to a disconnect of the horizontal stabilizer and subsequent loss of the aeroplane. This Airwothiness Directive (AD) mandates the serialization of the HSTA attachment pins and trunnions. Corrective Actions: A. Within 5000 hours air time or within five (5 ) years, from the effective date of this AD, or prior to reaching 40 000 flight cycles, wh ichever occurs first, inspect and add serial numbers and new part numbers to the following parts in accordance with Bombardier Service Bulletin (SB) 601R-27-160, dated 29 September 2011, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada:

Part Name Part Number Upper Pin 600-92384-5 Upper Pin 600-92384-7 Upper Pin 601R92310-1 Lower Pin 600-92383-5 Lower Pin 600-92383-7 Lower Pin 601R92309-1 Trunnion 601R92386-1No. N ° CF-2011-45 2/2

B. Within 30 days from the effective date of this AD, amend the Transport Canada approved maintenance schedule by: 1. Incorporating the structural life limit s for the HSTA trunnion as introduced by the Temporary Revision (TR) 2B-2180 of the Canadair Regional Jet Maintenance Requirement Manual (MRM), Appendix B, “Airworthiness Limitations”.
2. Incorporating the inspection requirem ents for the HSTA upper and lower pins as introduced by TR 2B-2186 of the Canadair Regional Jet Maintenance Requirement Manual (MRM), Appendix B, “Airworthiness Limitations”. C. Subsequently, comply with the new Airwor thiness Limitations described in Paragraph B of this AD. Authorization: For the Minister of Transport, Infrastructure and Communities 

### ORIGINAL SIGNED BY Derek Ferguson Chief, Continuing Airworthiness Contact: Mr. Anthony Wan, Continuing Airworthi ness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail CAWWEBFeedback@tc.gc.ca or any Transport Canada Centre.