As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APU START SEVERAL EICAS MESSAGES APPEARED AND REMAIN ON. R&R AC STATIC INVERTER. OPS CHECK SAT. ONLY FOR THE MESSAGE 115 VAC BUS OFF. OPS CHECK FAIL FOR ALL OTHER MESSAGES. FOUND FAULTY LGEU. R&R LGEU. OPS CHECK SAT. ALL EICAS FAULTS CLEARED. NO DEFECTS NOTED WITH GUST LOCK OPERATION.