As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 93 - APU FAULTED IN FLIGHT AND WOULD NOT RESTART. NO FAULTS WERE FOUND ON THE ECB. REPLACED THE ECB AS PRECAUTIONARY. PROBLEM FOUND TO BE A BROKEN GROUND WIRE TO THE STANDBY GENERATOR CONTROL VALVE. WIRE WAS REPAIRED AND STANDBY GENERATOR TEST WAS PERFORMED. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT APU WAS RETURNED TO SERVICE. (M)