What was found
DURING FLIGHT AT FL390 APU FLAMED OUT WITH EICAS MSG "APU FAULT". APU IN USE AS SECOND GENERATOR. DESCENDED TO FL350 FOR RESTART. APU STARTED NORMALLY THEN FLAMED OUT. RAN PROCEDURES IAW QRH.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING FLIGHT AT FL390 APU FLAMED OUT WITH EICAS MSG "APU FAULT". APU IN USE AS SECOND GENERATOR. DESCENDED TO FL350 FOR RESTART. APU STARTED NORMALLY THEN FLAMED OUT. RAN PROCEDURES IAW QRH.