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 (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)

1/1 No.

CF-2013-30

Issue Date 

 7 October 2013 

Number: CF-2013-30 

Subject: Tail Rotor Control Tube Oscillation and Damage 

Effective: 21 October 2013 

Applicability: Bell Helicopter Textron Canada (BHTC) Model 430 helicopter equipped with Tail 

Rotor Control Tube Assembly part number (P/N) 430-001-007-101. 

Compliance: Within 50 hours air time from the effective date of this AD, unless already 

accomplished. 

Background: There have been two reported cases of the subject control tube assembly bonded clevis 

failing. These failures were caused by fatigue cracking initiated by oscillation of the 

control tube assembly. 

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

Corrective 

Actions: 

1. Perform a one-time inspection of the tail rotor control tube assembly for damage, in 

accordance with the Accomplishment Instructions of BHTC Alert Service Bulletin 

(ASB) 430-13-51, dated 3 September 2013, or later revisions approved by Chief, 

Continuing Airworthiness, Transport Canada. 

2. If damage of the control tube assembly exceeds the allowable limits indicated in the 

above-noted ASB, contact BHTC for disposition as indicated in the Accomplishment

Instructions of the ASB. If BHTC Engineering evaluation of the tube damage allows 

for the tube to be returned to service, this tube may be re-installed providing that the 

applicable rectification is carried out and modification to this tube is performed as per 

paragraph 3 below prior to further flight. 

3. If the control tube assembly is not damaged or the damage is within the allowable 

limits, or BHTC Engineering determines that the tube can be returned to service,

prior to further flight, modify the control tube assembly in accordance with the 

Accomplishment Instructions of the above mentioned ASB. 

4. Replace control tube assembly P/N 430-001-007-101 with P/N 430-001-007-105 no 

later than 12 months from the effective date of this AD. 

Authorization: For the Minister of Transport, 

ORIGINAL SIGNED BY 

Derek Ferguson 

Chief, Continuing Airworthiness 

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

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