AMC is very inconsistant about what it will allow to be done in it's airplanes. As a former C-21 guy, we used to practice engine out (Idle) approaches and abnormal flap settings all the time. We had to. We only went to the sim in Dallas once a year, so the only way for us to train was to actually do the simulated emergencies in the aircraft. Fast forward to the C-17...Like the KC-10 community we don't do anything that resembles an emergency/abnormal in the actual airplane, but we have quaterly 2 day sim training. I'm not sure why the difference in the KC-135.