v1 speed
what happened to the V1 /decission speed?....past this speed you can't land back without a very good chance of running off the end of the rw
V1 speed is prior to Vr and the aircraft was airborne.
We must all try to learn from this accident and that the pilot must stick to the plan if you involve the V1 speed in you take off planning
If the pilot turned back prior to the first attempted take off due to a problem and the qualified engineer signed the aircraft out as servicable after the follow up inspection ,then the pilot was totaly within the law to attempt the next take off.
Lets not knock the pilot but learn something from it.