Originally Posted by
tdracer
Approach idle to go-around thrust will take less than 8 seconds regardless of airspeed (I've tested it on various Boeing aircraft sitting static on the ground - it usually takes about 6 seconds).
Should! There's a Boeing TI somewhere about mixing old v. new v. reconditioned MECs on engines (or something like that).
I've seen between 12 and 20 seconds when carrying out slam accelerations. According to the clever blokes with spanners it can be caused by putting a new MEC on an old donk.
Don't ask me why though.