What was found
APU FAILED INFLIGHT COLD SOAK START, FL400, OAT-57. REPLACED APU FUEL CONTROL UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
APU FAILED INFLIGHT COLD SOAK START, FL400, OAT-57. REPLACED APU FUEL CONTROL UNIT.