As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, WITH POWER SET AT APPROXIMATELY 90 PERCENT TORQUE, THE FLIGHT DECK STARTING TO FILL WITH UNIDENIFIED VAPOR. CABIN ALSO BEGAN TO FILL WITH VAPOR. ABORTED TAKEOFF. PERFORMED ENGINE RUNS. FOUND TO BE WATER VAPOR IN THE AIR CONDITIONING SYSTEM. RAN PACKS FOR 15 MINUTES TO CLEAR. OPS CHECK GOOD.