As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GROUND RETURN AND CANCELLATION DUE TO INOPERATIVE PACK. PACK 1 FAULT LIGHT INOP - AIR AIR. PROG TEXT: - ITEM ROLLED FORWARD. NR 1 PACK FLOW CONTROL VALVE REPLACED AND REPLACED SOLENOIDS 7170HM1, 10HA1. SWAPPED BOTH SDACS, PERFORMED CATIII CHECK. ACFT PACK SYSTEM OPS NORMALLY.