If you are performing a flex temp take-off you are spoofing a higher ambient temperature to trick the FADEC that the power available are a lot lower than what they actually are.
Stand the throttles up/in Flex/MCT anyway etc the engine will suddenly have the ACTUAL power available to it, getting you out of trouble; plus the flight crew will be at one engine out speed.
How this is read by the FADEC is based on many parameters. ENG FAIL msg is usually a command vs actual output in air mode. The procedure I presume would be to shut the engine down from the cut off switch defaulting CMD thrust on the good engine to MCT and ACTUAL Power Available.
Even with the ambient temperatures hot and high, the engine has an EGT margin that can be exceeded. How much you cook the engine depends on the situations.
Last edited by Beeline; 26th Jan 2012 at 14:35.