### 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 by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Can ada, 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 Communica tions 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 t hose 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 asse mbly 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 configurat ion. 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 se rvice 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 insta lled 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 Airworthi ness, Ottawa, telephone 613-952-4357, facsimile
613- 996-9178 or e-mail 

### CAWWEBFeedback@tc.gc.ca or any Transport Canada Centre.