As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ETOPS PDC CHECK, FOUND OIL FILTER APU DPI POPPED. ACFT GROUNDED. PERFORMED OIL FILTER INDICATOR INSPECTION IAW MM 49-91-13, R & R FILTER IAW 49-91-12, NO DEBRIS FOUND IN FILTER. OIL FILTER INDICATOR RESET. APU STARTED, OPS CHECKED GOOD.