As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WARMING THE COCKPIT TEMPERATURE ZONE TWO HAZY FOG POURED IN VENTS THROUGHOUT THE AIRCRAFT. FOUND NUMBER ONE PACK WATER SEPARATOR DIFFERENTIAL PRESSURE INDICATOR POPPED. RESET INDICATOR AND REPLACED WATER SEPARATOR BAG PER MAINTENANCE MANUAL CHAPTER 215100.