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 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 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 by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Canada, Ottawa, telephone 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 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)

1/2 No.

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 Service 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 contaminants 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 old grease in accordance with the 

Accomplishment Instructions contained 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 indication 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 six 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 later revisions approved by the Chief,

Continuing Airworthiness, Transport Canada. 

Part III – Daily Maintenance Procedure 

Within 30 days from the effective date of this AD, incorporate a check of the Rudder 

Spring Tab operation into the Daily inspection tasks of the Transport Canada approved 

maintenance schedule in accordance with the Accomplishment Instructions contained in 

the above mentioned applicable SB or later revisions 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.