As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MAINTENANCE GROUND RUN, THE RT ENGINE DEVELOPED A MAJOR OIL LEAK AND WAS IMMEDIATELY SHUT DOWN. TECHNICIANS DISCOVERED THE OIL FILTER BOWL HAD BLOWN OFF. ONE HOLD DOWN STUD HAD COMPLETELY PULLED ITS THREADS OUT OF THE OIL FILTER HOUSING. A SECOND HOLD DOWN STUD HAD PARTIALLY PULLED THREADS. THE BOWL WAS STILL HELD BY ONE STUD, WHICH HAD BEEN BENT WHEN THE OTHER STUDS FAILED. DUE TO THE DESIGN OF THE STUDS AND HOLD DOWN NUTS, NORMAL R&R OF THE OIL FILTER DOES NOT EFFECT THE THREADS THAT FAILED.