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 (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-2010-29R1

Issue Date 

26 July 2012 

Number: CF-2010-29R1 

Subject: Servo actuator Piston Rod - Corrosion and Cracking 

Effective: 9 August 2012

Revision: Supersedes Airworthiness Directive CF-2010-29 

Applicability: Bell Helicopter Textron Canada Models 222, 222B, 222U, 230 and 430 helicopters 

equipped with hydraulic servo actuators Part Number (P/N) 222-382-001-107. 

Compliance: As indicated below, unless already accomplished. 

Background: It has been determined that the output piston rod assemblies of the hydraulic servo 

actuators may be corroded and, consequently, prone for corrosion cracking. Also, in one 

case, an unapproved repair was found on the piston rod. 

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

The original issue of this AD mandates: 

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

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

This AD revision mandates a retrofit of the servo actuators with a stainless steel piston 

rod, allowing for a new overhaul interval of 10 000 hours air time or 10 years, whichever 

comes first. Also, an extension of compliance time of 600 hours air time or 6 months, 

whichever comes first, is authorized for certain actuators that have been re-inspected 

and found to meet the criteria for acceptance. 

Corrective 

Actions:

A. No later than 5 hours air time upon receiving the original issue of this AD, perform 

an inspection and, if applicable, rectify the servo actuator in accordance with the 

instructions provided in the applicable 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 or the inspection carried out as a condition of 

Transport Canada Alternative Means of Compliance (AMOC) AARDG/A33, the 

servo actuator will require a complete overhaul, or as an option, an upgrade in 

accordance with Part I of the Accomplishment Instructions of the applicable 

Bell Helicopter ASB listed below: 
No.

N° CF-2010-29R1 2/2 

Helicopter Model ASB 

222 and 222B 222-11-111 Rev. A dated 28 June 2012 

222U 222U-11-82 Rev. A dated 28 June 2012 

230 230-11-43 Rev. A dated 22 June 2012 

430 430-11-46 Rev. A dated 22 June 2012 

Based on the damage found during inspection above and the type of material 

applied as protection to the piston rod, this complete overhaul or upgrade has to 

completed within: 

1. 1200 hours air time or 12 months, whichever comes first, if the criteria of 

paragraph 1.c. of the Accomplishment Instructions of the applicable ASB listed 

in part B of this AD are met; or 

2. 2400 hours air time or 24 months, whichever comes first, if the criteria of 

paragraph 1.b. of the Accomplishment Instructions of the applicable ASB listed 

in part B of this AD are met; or 

3. 3000 hours air time or 48 months, whichever comes first, if the criteria of 

paragraph 1.a. of the Accomplishment Instructions of the applicable ASB listed 

in part B of this AD are met. 

For those actuators listed in Part B.1 and Part B.2 above which have reached their 

time limits but for various reasons cannot be overhauled or upgraded, an additional 

compliance time of 600 hours air time or 6 months, whichever comes first, is granted 

provided that an inspection in accordance with Part II of the Accomplishment 

Instructions of the applicable ASB listed in Part B of this AD is performed and the 

inspection results meet the criteria for acceptance described in these instructions. 

C. As of 26 August 2010 (the effective date of the original issue of this AD), no operator 

may install a replacement servo actuator, P/N 222-382-001-107, unless the servo 

actuator complies with Part A of this AD. 

Note:

The new overhaul interval for hydraulic actuator P/N 222-382-001-111 or 

222-382-001-111FM, of 10 000 hours air time or 10 years, whichever comes first, has 

been introduced as per Component Overhaul Schedule, Chapter 5 of the applicable 

Maintenance Manual.

Authorization: For the Minister of Transport, Infrastructure and Communities, 

ORIGINAL SIGNED BY

Philip Tang 

Acting Chief, Continuing Airworthiness 

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

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