AD/BELL 206/99 Amdt 3 - Cyclic Control Stick Assembly

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On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below repeals Airworthiness Directive (AD) AD/BELL 206/99 Amdt 2 and issues the following AD under subregulation 39.001 (1) of CASR 1998 and subsection 33 (3) of the Acts Interpretation Act 1901. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct an unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters
AD/BELL 206/99 Amdt 3
Cyclic Control Stick Assembly
All model 206A helicopters serial number 4 through 3818.
All model 206B helicopters serial number 3821 through 3848.
All model 206B-JR111 helicopters serial numbers 3851 through 3856.
All model 206B-1 helicopters.
All model 206A helicopters equipped with dual control kits:
·         P/N 206-706-006-3,
·         P/N 206-706-006-5, and
·         P/N 206-706-006-7.
All model 206L helicopters with serial numbers 51001 through 51128.
All model 206L-1 helicopters with serial numbers 51130 through 51138, and
All model 206L-3 helicopters with serial numbers 51140 through 51142.
All Agusta Bell AB206A and AB206B helicopters and all Agusta Bell AB 206A helicopters equipped with dual control kit part number 206-706-006 (All dashes).

Bell Alert Service Bulletin 206-85-29.
Bell Alert Service Bulletin 206L-85-36.
Agusta Bell Service Bulletin 206-169.

Unless already accomplished in accordance with the initial issue of this Directive, within 25 hours time in service after 31 November 1985 and thereafter, for both Bell and Agusta Bell helicopters, at intervals not exceeding 600 hours time in service or 24 months whichever occurs first.

The effective date of this AD is 15 June 2014.

An incident has been reported of a cyclic control stick failing while the pilot was performing his pre-flight checks.  The fracture, which occurred at the base of the stick tube, has been attributed to low cycle fatigue and corrosion.

Amendment 2 of this AD was issued to include Agusta Bell AB206A and AB206B helicopters.  Agusta Bell have followed the Bell Alert Service Bulletin 206-85-29, and have also called for a repetitive inspection which has been included to cover both Agusta Bell and Bell helicopters.
Amendment 3 of this AD is issued to clarify the applicability range affected by this AD.  There are no additional technical requirements introduced by this amendment.

Mike Higgins
Delegate of the Civil Aviation Safety Authority
10 June 2014