Friction

June 17, 2013 - 4:15am
AgustaWestland’s AW189 medium twin can run for 50 minutes after loss of gearbox lubrication, a condition that has caused several incidents among large transport category helicopters recently.

Loss of lubrication to the main gearbox (MGB) has been responsible for several crashes, ditchings and precautionary landings in large transport category helicopters in recent years. These accidents set off broad debate as to exactly what is required of main gearboxes under Part 29 certification of the U.S.

 
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