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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 Communicat ions Centre (AARA) at Place de Ville, Ottawa, Ontario K1A 0N8 , or 1-800-305-2059.

24-0022 (01-2001) This document is available on the web at : http://www.tc.gc.ca/aviation/ad/ad_e.htm 1/2 No

. CF-2010-29

Issue Date 26 August 2010

Number: CF-2010-29

Subject: Servo actuator

Effective: Upon receipt

Applicability: Bell Helicopter Textron Canada Models 222, 222B, 222U, 230 and 430 helicopters equipped with hydraulic servo actuator s Part Number (P/N) 222-382-001-107.

Compliance: As soon as possible, but no later than 5 ai r time hours upon receiving this directive, unless already accomplished.

Background: It has been determined that the output piston rod assemblies of the hydraulic servo actuators may be corroded and, consequently, pr one for corrosion cracking. Also, in one case, an unapproved repair was found on the piston rod.

This situation, if not corre cted, could result in a loss of control of the helicopter.

This AD mandates:

i. A one time inspection and, if applicable, rectification of the servo actuator.

ii. Complete overhaul of se rvo actuator P/N 222-382-001-107.

Corrective

Actions: A. Perform an inspection and, if applicable, rectify the servo actuator in accordance with the instructions provided in the app licable Bell Helicopter Alert Service Bulletin (ASB) listed below.

Helicopter Model ASB dated 18 August 2010

222 and 222B 222-10-109

222U 222U-10-80

230 230-10-41

430 430-10-44

B. Following compliance with part A, the servo actuator will require a complete overhaul based on the type of material appli ed as protection to the piston rod during the inspection/rework procedure, within:No.

N ° CF-2010-29 2/2

1. 1200 air time hours or 12 months, whichever come first, for zinc chromate primer, or

2. 2400 air time hours or 24 months, whic hever come first, for brush cadmium plating.

C. As of the effective date of this directiv e, no operator may install a replacement servo actuator, P/N 222-382-001-107, unless the serv o actuator complies with Part A of

this directive.

Authorization: For Minister of Transport, In frastructure and Communities

ORIGINAL SIGNED BY

Robin Lau for Derek Ferguson 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.