As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ETOPS PDC WALKAROUND FOUND APU LUBE OIL FILTER DPI BUTTON EXTENDED. ACFT GROUNDED. REF AMM 49-91-13-600-801 INSPECTED CHIP DETECTOR AND NO DEBRIS FOUND. INSPECTED OIL FILTER, NO DEFECTS NOTED. REPLACED OIL FILTER. PERFORMED OPS CHECK OF APU. NO LEAKS NOTED AT THIS TIME. GROUND VERIFICATION CHECK SUCCESSFUL.