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
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. CF-2013-08 Issue Date 12 March 2013

Number: CF-2013-08 Subject: Corrosion on the Rudder Upper Torque Tube Lower Bearing
Effective: 25 March 2013 Applicability: Bombardier Inc. aeroplanes: Model CL-215-6B11 (CL-215T), serial numbers 1056 to 1125; Model CL-215-6B11 (CL-415), serial numbers 2001 to 2990. Compliance: As indicated below, unless already accomplished. Background: During a routine inspection, corrosion was discovered on the Rudder Upper Torque Tube Lower bearing, part number (P/N) DAT48-64A . Corroded bearings may eventually result in a partial or total loss of axial support. As such, Bombardier has issued Serv ice Bulletin (SB) 215-A3171 Rev. 1 and SB 215-A4452 Rev. 1, which provide instructions to refresh the lubrication in the bearing in order to inspect for corrosion and/or cont aminants in the existing grease. These SBs will also incorporate an operational check to the 50 hour maintenance scheduled tasks, and a test of the Rudder Spring Tab operation into the Daily inspection or the aircrew Preflight Check. Corrective Actions: Part I – Lubrication of the Rudder Upper Torque Tube Bearing
A. Within three months from the effective date of this AD, refresh the bearing internal lubricant and examine the expelled ol d grease in accordance with the Accomplishment Instructions cont ained in the applicable issue of SB 215-A3171 Rev. 1 (dated 25 January 2012) or SB 215-A4452 Rev. 1 (dated 03 January 2012) or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.
B. If contaminants, metal wear and/or indi cation of corrosion is detected, replace bearing prior to further flight. C. Repeat the inspection specified in Part I of this AD before and after every fire season or at intervals not to exceed si x months, whichever occurs first. NOTE: It is recommended that Part I be carried out in conjunction with AD CF-2008-29 as the task intervals are the same and the tasks are in the same general area.No. N ° CF-2013-08 2/2
Part II – Operational Check Within 30 days from the effective date of this AD, incorporate the Rudder Spring Tab Operational Check into the 50 hour tasks of the Transport Canada approved maintenance schedule in accordance with the Accomplishment Instructions contained in the above mentioned applicable SB or late r revisions approved by the Chief, Continuing Airworthiness, Transport Canada. Part III – Daily Maintenance Procedure Within 30 days from the effective date of th is AD, incorporate a check of the Rudder Spring Tab operation into the Daily ins pection tasks of the Transport Canada approved maintenance schedule in accordance with the Accomplishment Instructions contained in the above mentioned applicable SB or later re visions approved by the Chief, Continuing Airworthiness, Transport Canada.
Authorization: For the Minister of Transport, Infrastructure and Communities, 

### ORIGINAL SIGNED BY Derek Ferguson Chief, Continuing Airworthiness Contact: Yosha Mendis, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail ADs@tc.gc.ca or any Transport Canada Centre.