As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF EA 06-070332-03AD (SIP MOD), A HOLE WAS DAMAGED BY A BROKEN DRILL BIT ON THE NR 1 PYLON AFT BULKHEAD. THE DAMAGE REQUIRED THE HOLE TO BE OVERSIZED TO 0.640 AND OVERSIZED FASTENER INSTALLED PER BOEING APPROVAL, AS DETAILED IN ERA 460837-14AD.