Thank you! So the AFM should also tell the MTOW in case of one engine out during the takeoff phase.
Cheers!
Commercial aircraft must be capable of continuing a take-off if the critical engine fails around V1, (and are certified to do so). With a twin engined aircraft, this means they must be capable of continuing the take-off and safely climbing away if one engine fails as V1 is reached.
If on the day, conditions are challenging: very hot or very low pressure, tail-wind or the runway is contaminated etc, or there is challenging terrain on the climb-out, then the aircraft must not be loaded to MTOW but instead the (lower) RTOW. The RTOW is calculated or checked for every take-off, taking the conditions and locality into account, and the aircraft must not be loaded above this weight.
On something medium sized such as Airbus 320 family, on most days from most international airports, the RTOW will be same as the MTOW, but where the runway or the MET conditions are limiting - for example Gibralter - the RTOW can be tonnes less than the MTOW.