{TAIL ~ A multifunction integrated power unit} for {HEAD ~ use} aboard aircraft provides the functions both of an auxiliary power unit and of an emergency power unit while being smaller, lighter, and less expensive than the two units it replaces 
{ TAIL ~ A multifunction integrated power unit } for { HEAD ~ use } aboard aircraft provides the functions both of an auxiliary power unit and of an emergency power unit while being smaller , lighter , and less expensive than the two units it replaces
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH