As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDED MCI UNDER AMBER ALERT DUE TO ELECTRICAL AND PRESSURIZATION PROBLEMS. FOUND NR 1 TRANSFER NORMAL CIRCUIT BREAKER POPPED. COULD NOT DUPLICATE PROBLEM ON THE GROUND DURING TROUBLESHOOTING. REPLACED CIRCUIT BREAKERS C819, C826, C806, AND NR 1 TRANSFER UNIT. BASED ON PREVIOUS HISTORY THE NR 1 TRANSFER NORMAL CIRCUIT BREAKER (C819) IS SUSPECT AS THE CAUSE OF THE PROBLEM.