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 206/100 Main Rotor Blade Retaining Nuts
P/N 206-011-119-1
12/85
Applicability: All Augusta Bell AB206A and AB206B helicopters up to and including S/N8692 equipped with P/N206-011-119-1 non- metallic locking feature nuts.
Requirement: Augusta B.T. No. 206-168.
Compliance: Part I: Before further flight after 4 November 1985 and thereafter at each daily inspection prior to compliance with Part II of the requirement document.
Part II: Before further flight after 31 December 1985.
Background: An AB206B-1 helicopter main rotor blade retaining nut P/N206-011-119-1 was found cracked during a main rotor head inspection following reports of an abnormal vibration level, level, which became more evident during engine shut-down.