As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLO - WHITE SMOKE FILLED COCKPIT AND CABIN. TURNED OFF ENVIRONMENTAL VALVES. MAINTENANCE FOUND AFT VENT BLOWER INOPERATIVE. RAN AIRCRAFT WITH BLEEDS OPEN AND COULD NOT DUPLICATE AT THIS TIME. MEL'D BLOWERS AND LATER REPLACED AFT VENT BLOWER. (M)