As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRECAUTIONARY ENGINE SHUTDOWN DUE TO LOSS OF OIL. SHUTDOWN WHEN OIL PRESSURE STARTED TO DECREASE. ENGINE OIL PRESS/TEMP GOOD UNTIL TOUCHDOWN. PERFORMED ABNORMAL PROCEDURES. N1 & N2 ROTATION GOOD UNTIL TOUCHDOWN. ENGINE NR 1. FOUND GEARBOX THRU STUD FELL OUT AND OIL LEAKING FROM GEARBOX SUMP. INSTALLED INSERT AND REINSTALLED STUD PER MM 72-61. RAN ENGINE, LEAK CHECK NORMAL. NO LEAKS NOTED.