From Airbus Safety First:
- What are the operational implications of not respecting V1?
Supposedly, there are two different ways of “disrespecting” the V1 speed criteria:
1 - The crew decides to continue take-off while an engine failure occurred before V1.
Standard procedures encourage the crew to reject take-off if an engine fails before V1. If take-off is continued despite this recommendation, then the aircraft can potentially exit the runway laterally, or be unable to take-off before the end of the runway.
2 - An RTO is initiated above V1.
Virtually, any take-off can be “successfully” rejected, on the proviso that the reject is initiated early enough and is conducted properly. In this respect, the crew must always be prepared to make a GO/ NO GO decision prior to the aircraft reaching V1.
Doing otherwise exposes the aircraft to an unsafe situation where there either may not be enough runway left to successfully stop the aircraft - therefore resulting in a longitudinal runway excursion-, or maximum brake energy is exceeded and brakes catch fire.