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. 

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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 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) 1/2 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.