What was found
WE (PILOT, NURSE, MEDIC) WERE RETURNING FROM OUR FUELING POINT AFTER COMPLETING AN INTER-FACILITY TRANSFER. APPROXIMATELY FOUR MINUTES INTO A SIX-MINUTE FLIGHT, THE PARAMEDIC SITTING IN THE COPILOT SEAT (WITHOUT CONTROLS) , ASKED IF HE COULD OPEN THE SLIDING WINDOW, DUE TO OUR AIR CONDITIONER BLOWING WARM AIR. UPON OPENING THE WINDOW, IT BECAME DETACHED FROM THE AIRCRAFT.