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 may invalidat e 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 b y the Continuin g Airworthiness Division ( AARDG ) , National Airc r aft Certification Branch, Trans p ort Canada, Ottawa, tele p hone ( 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 o f his or her name or address. To request a change of address, contact the Civil Aviation Communica tions Centre (AARA) at Place d e Ville, Ottawa, Ontario K1A 0N8 , or 1-800-305-2059. 2 4-0022 (01-2001) This document is available on the web at : http://www.tc.gc.ca/a viation/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 wa s found on the piston rod. This situation, if not corrected, could resu lt 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 se rvo actuators with a st ainless 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 Be ll 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 Accomp lishment 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, wh ichever comes first, if the criteria of paragraph 1.c. of the Accomplishment In structions of the applicable ASB listed in part B of this AD are met; or
2. 2400 hours air time or 24 months, wh ichever comes first, if the criteria of paragraph 1.b. of the Accomplishment In structions of the applicable ASB listed in part B of this AD are met; or
3. 3000 hours air time or 48 months, wh ichever comes first, if the criteria of paragraph 1.a. of the Accomplishment In structions of the applicable ASB listed in part B of this AD are met. For those actuators listed in Part B.1 an d 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 acc eptance 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 actuat or, P/N 222-382-001-107, unless the servo actuator complies with Part A of this AD. Note: The new overhaul interval for hydr aulic 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.