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Instrument
Instrument identification
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bell Helicopter Textron 212 Series Helicopters
AD/BELL 212/47 Lower Planetary Spider Gear 9/91
DM
Applicability
Applicability
All Models.
Requirement
Requirement
Action in accordance with Bell Alert SB No. 212-91-66.
Compliance
Compliance
As directed in the Requirement Document with a revised effective date 12 July 1991.
Background
Background
A special inspection of the main gearbox lower planetary spider gear P/N 204-040-
785-003 has been introduced by the manufacturer after fatigue cracking has been detected.