As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU IN FLIGHT START FL 410, OAT -60. UNSUCCESSFUL STARTED ON 3 ATTEMPTS. PERFORMED FCMS INPUT PENTAMETERS FROM PAGES 1-11 ALL CKD GOOD. ALSO APU SHUTOFF VALVE AND OPERATION TEST IAW AMM 28-29-00 AND INPUT TEST IAW FIM 49-61-00-810-836.