As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU ELECTRICS DROPPED OFF LINE 2 TIMES. GVI ON APU NO DEFECT FOUND. APU GCU LRU TEST PASSED. APU BITE NO CURRENT FAULT NO RELATED FAULT FOUND ON FAULT HISTORY & NO HISTORY IN TRAX. PERFORMED OPERATIONAL TEST FOR AC GENERATION & CONTROL SYSTEM REF MM 24 21 00 700 803 STEP E, OPS NORMAL.