This includes takeoff or landing {TAIL ~ emergency conditions} wherein {HEAD ~ the propellers} are retracted to the maximum performance position 
This includes takeoff or landing { TAIL ~ emergency conditions } wherein { HEAD ~ the propellers } are retracted to the maximum performance position
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH