As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE 375 HOUR REPLACEMENT OF THE MGB LUBE PUMP VESPEL SPLINE ADAPTER ON THE NR 2 SIDE, THE UPPER STUD WAS BROKEN. AFTER FURTHER INVESTIGATION OF THE R/H MGB LUBE PUMP UPPER STUD AREA WE DISCOVERED CRACKING OF THE CASE AROUND THE BASE OF THE STUDS