Take off thrust settings for Windshear
Reading the FCOM SP section regarding Windshear and it states,
"Takeoff with full rated takeoff thrust is recommended, unless the use of a fixed
derate is required to meet a dispatch performance requirement."
I have two questions:
(a) When would we be required to meet a dispatch performance requirement thus reducing the thrust setting to a fixed derate?
(b) If your aircraft has an extremely light takeoff weight - in this case, would you consider using 'airmanship' (common sense) and do a derated takeoff instead of a full rated takeoff with an 'insane' vertical rate? Taking this scenario even further, what if there was a low level off altitude (e.g. 3000 ft)?