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)

1/1 No.

CF-2010-07

Issue Date 

24 February 2010 

Number: CF-2010-07 

Subject: Non-Conforming Tail Rotor Disc Assembly 

Effective: 19 March 2010 

Applicability: Bell Helicopter Textron Canada (BHTC) Model helicopters: 

Model Serial Numbers 

206A Serial number 004 through 660 and 672 through 715 

206B All serial numbers including those converted from Model 206A 

206L Serial number 45004 through 45153 and 46601 through 46617 

206L-1 Serial number 45154 through 45790 

206L-3 Serial number 51001 through 51612 

206L-4 All serial numbers 

Compliance: No later than 100 flight hours or 30 days from the effective date of this directive unless already 

accomplished. 

Background: It has been determined that new tail rotor disc assembly Part Number (P/N) 101584-1 or -2, sold 

through Bell Helicopter Spares beginning March 2009, as an alternate to P/N 32721-1, does not 

conform to the approved configuration. Operating a helicopter with disc assembly P/N 101584-1 or -

2 installed may result in loss of control of the helicopter. 

This directive mandates the removal from service tail rotor disc assembly P/N 101584-1 and -2. 

Corrective 

Actions: 

1. Verify if a disc assembly P/N 101584-1 or -2 is installed on the helicopter. 

2. If a disc assembly P/N 101584-1 or -2 is installed on the helicopter, prior to further flight, 

replace it with an airworthy disc assembly P/N 32721-1 in accordance with instructions 

provided in applicable Alert Service Bulletins Rev A dated 10 June 2009, listed below or later 

revisions approved by the Chief, Continuing Airworthiness, Transport Canada. 

Helicopter Model Alert Service Bulletin 

206 series 206-09-123 Rev A 

206L series 206L-09-157 Rev A 

3. If a disc assembly P/N 101584-1 or -2 is not installed on the helicopter, no further action is 

required other than compliance with paragraph 4 of this directive. 

4. As of the effective date of this directive, no operator may install replacement disc assembly 

P/N 101584-1 or -2, on the helicopter. 

Authorization: For Minister of Transport, Infrastructure and Communities 

ORIGINAL SIGNED BY 

Derek Ferguson 

Acting Chief, Continuing Airworthiness 

Contact: Mr. Bogdan Gajewski, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

613- 996-9178 or e-mail CAWWEBFeedback@tc.gc.ca or any Transport Canada Centre.