COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell Helicopter Textron 47 (All Variants) Series Helicopters AD/BELL 47/81 Amdt 2 Tail Rotor Pitch Links 10/86 Applicability: All models fitted with P/N 47-641-170 series (206 type) tail rotor assembly. Document: Bell Alert Service Bulletin 47-80-5, Revision A. Kawasaki-Bell S.B. KSB-Bell 351. Compliance: Within 100 hours time in service after 31 July 1980. Background: Excessive rod end bearing wear could allow displacement of the pitch link and restrict blade flapping. This Directive is revised to reflect a change in the compliance document, which introduces a replacement bolt and safety washer. This Directive has been amended to include Kawasaki-Bell Helicopters.