As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FIRST FLIGHT OF DAY AFTER APU START, PACK WENT FULL HOT AND AFT PORTION OF THE CABIN FILLED WITH HEAVY HAZE. C/W NO GO ODI 2172. MCC NOTIFIED. R/R WATER SEPARATOR BAGS IAW MD88 AMM 21-20. FOUND NOTHING ABNORMAL. INSPECTED TAIL SECTION OF PNEUMATIC DUCTS . SUSPECTED CREW OVERTEMPED PNEUMATIC SYSTEM. (899852) RAN BOTH ENGINES WITH PAX ON HIGH WITH NO DISCREPS FOUND. (LP5058600)