Data
A few things:
Helicopter returning to base at about 700-800 Feet, night time
Hi inertia Impact, no survivors
Low Main rotor Blade Damage
No distress Call
No post Crash Fire
No weather related
Initial findings by the AAIB have confirmed that the aircraft made a vertical descent onto the Clutha Vaults pub, and that no part of the aircraft detached in flight.
This type of helicopter was grounded for a time in 2012 because of safety concerns.
Eurocopter published an interim Safety Information Notice on the day following the accident, with no special measures recommended
Witness: there was no fireball and I did not hear an explosion. It fell like a stone. The engine seemed to be spluttering.