Engineer ex 412, we were told during training the No 2 would always run hotter then No 1 , if both engines had the same power, due to the position of the thermocouple harness, and the bleed valve positon.also the airflow over the top of the engine cowlings was supposed to cause a difference in itt's. But it doesnt take long for engines to develope different power causing high itt diferences, when I was operating 2 x 412's in the north of Pakistan, Gilgit and Chitral, the gritty landing areas would chew up the engines pretty quick, as for the rotor droop, needs adjusting on the compensator, but the pilot has his beeps anyway. Hope this helps you.
