A tip: an engine is considered “Cold” when its internal temperature is equal to the outside air temperature.No matter what the OAT is, thermal stabilization is achieved four to six hours after the engine is shut down.
For a cold engine, while two minutes is the strict minimum before applying takeoff thrust, CFM considers that 10 to 15 minutes at or near idle is needed for a complete thermal stabilization, in order to reduce all gaps, and therefore peak EGT at takeoff.
Last edited by de facto; 1st March 2014 at 21:05.