
The crew were rostered to operate both sectors and the outbound flight to Gatwick was uneventful. The commander of the 2012-built jet reported that turnaround had been completed without issue and the aircraft was pushed back from its stand at 11.06am. During preparations for the return connection, the crew planned to depart from intersection A using one stage of flaps and an assumed temperature of 55°C. As most jet aircraft use less than full engine power for take-off where runway length permits, the 737 allows for a reduction in power by using an ‘assumed temperature’ higher than the actual outside air temperature.