Emergency descent during take-off

urn:aero:airm:1.0.0:ContextualModel:ATMBusinessTerms:Emergency_descent_during_take-off

The phase of flight in which an intentional descent is made, in response to an emergency, which occurs after rotation but before the first prescribed power reduction, on reaching 1500 feet (450 metres) or the vfr pattern, whichever comes first.

Source: ICAO