https://aviation-safety.net/wikibase/262192
A Bell 206B JetRanger II sustained substantial damage entering the hover at Langley Regional Airport (YLY/CYNJ), Langley, British Columbia for a Rotor Track and Balance.
A Bell 206B JetRanger II sustained substantial damage entering the hover at Langley Regional Airport (YLY/CYNJ), Langley, British Columbia for a Rotor Track and Balance.
The article below gives an insight into tracking and balancing. I would presume that a track and balance was initially done whilst the helicopter was on the ground and this flight was to fine tune those results. As the article says, tuning rotor track to give minimum airframe vibration does not necessarily mean the blades will be in track. A complex subject. My friend 'Wunper' - as in "one per rev" - on TOP is the expert in these things. I haven't been in contact with him for a few years so will try and persuade him to come over here.
this flight was to fine tune those results