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. 

URGENT URGENT URGENT URGENT URGENT URGENT URGENT URGENT URGENT

TRANSPORT CANADA EMERGENCY AIRWORTHINESS DIRECTIVE 

PLEASE FORWARD IMMEDIATELY TO THE PERSON RESPONSIBLE FOR THE OPERATION 

AND MAINTENANCE OF YOUR AIRCRAFT

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-2007-21R1

Issue Date 

30 November 2010

Number: CF-2007-21R1 

Subject: Tail Rotor Blades 

Effective: Upon receipt

Revision: Supersedes Airworthiness Directive CF-2007-21 

Applicability: Bell Helicopter Textron Canada (BHTC) helicopter Models: 

206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427 

and 430 

Compliance: Before next flight unless already accomplished. 

Background: There were three reports of balance weights departing from the tail rotor 

blades during flight. The cause has been narrowed down to missing weight 

screws. This failure can happen at any time. This condition, if not corrected, 

could lead to loss of control of the helicopter. 

Since the issuance of the original directive, the blade manufacturer has 

determined that a batch of additional blades could be affected. This revision 

extends applicability of this directive to cover the affected blades. 

Corrective 

Actions:

Verify if the affected blades are installed on the helicopter as per applicable 

Alert Service Bulleting (ASB) listed below, or later revisions approved by 

Chief, Continuing Airworthiness, Transport Canada. Remove the affected 

blades before further flight and replace with airworthy parts. 
No.

 N° CF-2007-21R1 2/2 

Helicopter 

Model 

Alert Service Bulletin Date 

206A 206-07-116 Rev.B 29 November 2010 

206B 206-07-116 Rev.B 29 November 2010 

206L 206L-07-148 Rev.B 29 November 2010 

206L-1 206L-07-148 Rev.B 29 November 2010 

206L-3 206L-07-148 Rev.B 29 November 2010 

206L-4 206L-07-148 Rev.B 29 November 2010 

222 222-07-106 Rev.D 29 November 2010 

222B 222-07-106 Rev.D 29 November 2010 

222U 222U-07-77 Rev.D 29 November 2010 

230 230-07-38 Rev.D 29 November 2010 

407 407-07-81 Rev.B 29 November 2010 

427 427-07-18 Rev.B 29 November 2010 

430 430-07-41 Rev.D 29 November 2010 

Authorization: or Minister of Transport, Infrastructure and Communities 

RIGINAL SIGNED BY

hief, Continuing Airworthiness 

Contact:

e-mail 

CAWWEBFeedback@tc.gc.ca

F

O

Robin Lau for 

Derek Ferguson 

C

Mr. Bogdan Gajewski, Continuing Airworthiness, Ottawa, telephone 

613-952-4357, facsimile 613-996-9178 or 

 or any Transport Canada Centre.