What was found
PRECAUTIONARY ENGINE SHUTDOWN NR 1 ENGINE DUE TO LOSS OF OIL QUANTITY FOLLOWED BY LOSS OF OIL PRESSURE. ENGINE SHUTDOWN 16 MIN OIL PRESSURE 15 PSI. ENGINE STABILIZED AT FLT IDLE FOR 20 MIN PRIOR. FOUND GEARBOX STUD AT FWD 6 O' CLOCK POSITION LAYING IN COWLING AND OIL LEAKING AT STUD HOLE. REINSTALLED STUD AND TORQUED TO SPECS, SERVICED ENGINE OIL, INSPECTED MAIN OIL STRAINER, NO DEFECTS. GROUND RAN, NO LEAKS NOTED.