This collection consists of several manuals: Bell Helicopter Illustrated Parts Breakdown, Model 47 Series Helicopter, 30 September 1953; Bell Maintenance and Overhaul Instructions, Introduction, 30 ...
Model 427 helicopters (Docket No. 2001-SW-43-AD) - revises an earlier proposed airworthiness directive for Bell Model 427 helicopters that would have required modifying each auxiliary fin by ...
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