COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters AD/BELL 206/140 Collective Idler Link and Collective Lever 13/98 Applicability: All BHTC Model 206L-4 helicopters. Requirement: To ensure that part numbers of the collective idler link and collective lever correspond with the proper airworthiness life limitations, accomplish the following: 1. Check the part number (P/N) and assign the proper corresponding retirement life as per the following schedule: Item Part Number Retirement Life (a) Collective Idler Link P/N 206-010-446-105 Serial No. A-1 through A-27 and RE-238 through RE- 270 1200 hours (b) Collective Idler Link P/N 206-010-446-105 having serial numbers other than those in (a) above, and Collective Idler Link P/N 206-010- 446-107. 4800 hours (c) Collective Lever P/N 206-010-447-105 Serial A-1 through A-22 1200 hours (d) Collective Lever P/N 206-010-447-105 having serial numbers other than those in (c) above, and Collective Lever P/N 206-010-447-109 4800 hours 2. Remove from service all parts that have already reached or exceeded their airworthiness limitation and replace them with serviceable parts. 3. Re-identify the collective idler link and collective lever that have a retirement life of 4800 hours to the new part numbers, as outlined below and in Part II of BHTC Alert Service Bulletin 206L-98-110: Component Old Part Number New Part Number Collective Lever Link 206-010-446-105 206-010-446-107FM Collective Lever 206-010-447-105 206-010-447-109FM Note: Transport Canada AD CF-98-20 refers. Compliance: Unless already accomplished, within 100 hours time in service after 3 December 1998. This Airworthiness Directive becomes effective on 3 December 1998. COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Background: It has been determined that the collective idler link and the collective lever, when manufactured from two different materials, have substantially different airworthiness lives, while still being identified with a single part number. Parts manufactured from forged material have a longer life than those of rolled plate stock. Therefore, re- identification of the affected parts and corresponding life limitation are necessary.