What was found
RETURNING TO BASE AT THE COMPLETION OF A SCENE FLIGHT, THE ECS UNIT WAS TURNED ON. AFTER A FEW MINUTES THE MEDIC, IN THE CABIN, STATED THAT THERE WAS A FOG IN THE CABIN & A STRONG SMELL OF JET FUEL. THE PILOT BACKED UP BY THE NURSE HOLDING THE RFM RAN THE SMOKE & FUME ELIMINATION CHECKLIST. SINCE THE PILOT SUSPECTED THE SMOKE WAS COMING IN THROUGH THE CABIN ECS DUCTING, THE PILOT TURNED OFF THE ECS. THE AIR IMMEDIATELY CLEARED & THE SMELL OF FUEL WENT AWAY. AS THE SHIP WAS ONLY THEN A FEW MILES FROM THE BASE, THE CREW LANDED BACK AT BASE & NOTIFIED MX. THE PILOT INSPECTED THE NR 1 ENG COMPARTMENT & FOUND OIL LEAKING FROM BOLTS ON THE COMPRESSOR CASE. THE MECHANIC HAD TOPPED OFF THE OIL EARLIER IN THE DAY & NOW AFTER LESS THAN AN HOUR OF FLIGHT, THE OIL LEVEL HAD DROPPED TO ADD 2 QUARTS LINE. MX ACTIONS ARE ONGOING.