As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR PACK TEMP IS UNCONTROLLABLE IN EITHER MANUAL OR AUTO WHEN USING APU AIR. WILL RUN FULL HOT AND SMOKES CABIN. NOTE: CONTROLLABLE IN (MAN) MODE WITH ENGINE AIR, OTHERWISE SMOKES CABIN. PACK NR 2 HIGH TEMP LIGHT COMES ON. MAINTENANCE REMOVED AND REPLACED NR 2 AIR CYCLE MACHINE THAT WOULD NOT TURN/ SEIZED. C/W WORK INSTRUCTIONS OF EO E04/022/621 REV C, NO DEFECTS NOTED.