As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LOW PRESSURE AIR WAS DISCONNECTED, ONCE APU LCV AND L PACK WAS TURNED ON, LIGHT HAZE SEEN AND SMELT IN COCKPIT. HAZE REPORTED FA IN CABIN AS WELL. INITIAL THOUGHT SMELT ELECTRICAL. AIRCRAFT REMOVED FROM SERVICE. CLEANED L AND R WATER SEPARATOR COALESCENT IAW AWAC SUPP 14-192A CYC PACKS, OPS CK AND RECHEDCK GOOD AT THIS TIME.