If during your takeoff roll you lose one engine on a twin engine jet below speed V1[0], you reject the take-off. V1 is calculated for the aircraft such that abo

If during your takeoff roll you lose one engine on a twin engine jet below speed V1[0], you reject the take-off. V1 is calculated for the aircraft such that above that speed you are able to safely take off and execute a go-around in order to land again on just that single engine. Aborting above V1 is heavily discouraged because usually there's a strong risk of running off the end of the runway. Of course, if you lose both engines above V1, you're really in trouble and left without much choice. But we don't know what happened with this flight so nothing I've said here should be taken as indicative of whatever went wrong in this case. It's purely information. [0] Which depends on many factors including the type of aircraft, loading, weather conditions, state of the runway surface - for example, wet, or iced - etc., and needs to be calculated afresh for every take off.