As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GENERATOR DROPPED OFF LINE ON GROUND ZERO AMPS ZERO VOLTS. PERFORMED BITE CHECK OF APU DISPLAYED FAULT CODE 49 41012. REPLACED APU GENERATOR REF MM 49 41 21. ALSO APU MAGNETIC CHIP DETECTOR WAS CLEAN ALONG WITH OIL FILTER. PERFORMED OPS AND LEAK CHECK ALL CHECKS GOOD.