As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - FRM 49110300 APU WILL NOT START APU FAULT ILLUMINATED. BITE CK ECU FOUND (LOW OIL PRESS FAULT) CK MAG PLUGS NO METAL NOTED. REPLACED LOW OIL PRESS SWITCH COND SAME FOUND OIL FILTER DETA "P" POPPED. REMOVED FILTER REF FOR S/W MM49-94-02. REPLACED APU OIL FILTER PER AMM49-27-03. OPS AND LEAK CK GOOD.