As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT ECAM ILLUMINATED. APU LAST LEG SHOWS LUBE PUMP FILTER & GENERATOR SCAVANGE FILTER. PERFORMED TSM 49-62-00-810-916-A. LUBE AND GEN FILTERS SHOW NO METAL PARTICLES. BOTH DPIS NOT EXTENDED. APU WIRING CHECKED OK IAW TSM 49-62-00-810-916-A, STEP 4.D.(2)(B). REMOVED AND REPLACED THE GENERATOR SCAVENGE & LUBRICATION DELTA P SWITCHES AND COMPLETED TSM 49-62-00-810-916-A. OPS & LEAK CHECKED OK.