ACR DEPARTS WITHOUT WT AND BAL RECORD THAT WAS NOT BOARDED WITH OTHER RECORDS BY MAINT.

Narrative

WHILE DEPLANING PAX AFTER ARRIVING IN KNOXVILLE; I HEARD A PAX SAY SOMETHING LIKE 'LOOKS LIKE HALLOWEEN BACK THERE.' I ASKED THE FLT ATTENDANT WHAT THE PAX WAS REFERRING TO. APPARENTLY AFTER WE LANDED AT TYS; THE CABIN BEGAN TO FILL WITH 'FOG' FROM THE AIR CONDITIONING SYS TO A HT OF ABOUT 3 FT FROM THE FLOOR. IT IS NOT UNCOMMON TO SEE SOME VAPOR COMING FROM THE VENTS ON HIGH HUMIDITY DAYS WITH COLD AIR OUTPUT FROM THE PACKS; BUT THIS AMOUNT WAS QUITE EXCESSIVE. I DISCUSSED WITH THE FLT ATTENDANT THE IMPORTANCE OF NOTIFYING THE COCKPIT CREW WHEN SUCH THINGS OCCUR AND THE APPROPRIATE ACTIONS TO BE TAKEN. SHE DID NOTIFY THE PAX NOT TO BE ALARMED DURING THE TAXI AS IT WAS MERELY VAPOR/CONDENSATION FROM THE AIR CONDITIONING SYS. AFTER THE PAX HAD DEPLANED; I NOTIFIED OUR STATION OF THE NEED TO CONTACT MAINT AND DELAY THE FLT UNTIL THE AIR CONDITIONING ANOMALY WAS EVALUATED AND CORRECTED. MAINT PERSON RESPONDED WITHIN MINS AND THE ACFT WAS CLRED TO RETURN TO CVG IN REVENUE SVC AFTER AN APPROX 90 MIN DELAY. THE MECH HANDED ME THE MAINT PAPERWORK BEFORE WE DEPARTED AND I REVISED MY 'WRITE-UP' AND HIS CORRECTIVE ACTIONS. IT IS MY NORMAL PRACTICE TO NOT ONLY REVIEW THE CORRECTIVE ACTIONS AFTER MAINT HAS BEEN PERFORMED BUT TO ALSO REVIEW THE ENTIRE PAPERWORK TO MAKE SURE THAT ALL PAPERWORK IS ABOARD BEFORE DEP. I THOUGHT THAT I HAD DONE SO IN THIS CASE BUT APPARENTLY NOT. UPON ARR IN CVG WE WERE NOTIFIED THAT WE HAD LEFT THE ACFT WT AND BAL RECORD IN TYS. APPARENTLY WHEN THE MECH WAS INSIDE IN OPS HE EITHER REMOVED THE WT AND BAL RECORD FROM THE PAPERWORK AND FORGOT TO PUT IT BACK; OR IT FELL OUT; BUT WHEN HE RETURNED THE PAPERWORK TO ME IN THE ACFT IT WAS NOT PRESENT IN THE PAPERWORK. THIS WAS PARTICULARLY DISTRESSING AS I AM EXCEPTIONALLY THOROUGH IN THESE MATTERS. HOWEVER; IN THE FUTURE; I WILL MAKE YET FURTHER EFFORTS TO ENSURE THIS TYPE OF MISTAKE DOES NOT HAPPEN AGAIN.