As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REPLACEMENT OF THE GALLEY HEATED (FORWARD) DRAIN MAST (P/N 4E3160-1), ONE OF THE SIX ATTACH SCREWS (MS35191-292) WAS BROKEN OFF INSIDE THE UNDERLYING NUT PLATE. TEMPORARY REPAIR IAW STS ENGINEERING EA 9-2011-24. REPEAT INSPECTIONS EVERY 150 FLIGHT HOURS. WITHIN 600 FLIGHT HOURS, ACCOMPLISH A REPAIR TO THE DAMAGED AREA IN ACCORDANCE WITH OEM APPROVED PROCEDURES.