What was found
FUEL SERVO LEAKED WHILE ACFT WAS PARKED OVERNIGHT. THE MIXTURE WAS IN CUT OFF POSITION. FLIGHT MANUAL, SEC 4, NORMAL PROCEDURES PAGE 4-23 SECURING ACFT NR 10 STATES: FUEL SELECTOR VALVE RT OR LT TO PREVENT CROSS FEEDING. IF THE FUEL SELECTOR VALVE WAS TURNED TO OFF, THIS WOULD HAVE PREVENTED. THERE IS A POTENTIAL FOR FUEL TO ENTER ENGINE CYLINDERS AND OIL SUMP IF THE FUEL SERVO MIXTURE CUT OFF LEAKS USING FLIGHT MANUAL PROCEDURES. NEED TO ADDRESS: FLIGHT MANUAL PROCEDURES TO FUEL SELECTOR VALVE OFF. (K)