As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - FLT 1402 - EN ROUTE SFO-DFW, APU AUTO SHUTDOWN RESULTING IN APU GENERATOR GOING OFFLINE. AIR INTERRUPTED AND DECLARED EMERGENCY. LANDED WITHOUT INCIDENT. REPLACED RIGHT IDG, WHICH HAD BEEN PREVIOUSLY MEL'D. ALSO REPLACED APU ELECTRONIC CONTROL UNIT. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)