What was found
AIRCRAFT GROUNDED, DURING DESCENT, FLT ATTENDS REPORTED A STRONG ODOR IN AFT HALF OF CABIN. LIKENED TO ODOR OF EXHAUST. DISSIPATED AFTER LANDING. NO ODORS IN FLT DECK OR FWD HALF OF CABIN. MAINTENANCE FOUND THE APU FCU & LUBE MODULE LEAKING OIL OUT OF THE AFT BELLOW DRAIN PORT ALONG WITH EVIDENCE OF COKING IN THE APU GEABOX VENT TUBE & AIR OIL SEPARATOR - MAINTENANCE REPLACED THE FCU PER AMM 49-32-11 - THE LUBE MODULE WAS REPLACED PER AMM 49-91-45 *AALA202608124014* - THE APU GEARBOX VENT TUBE WAS REPLACED PER AMM 49-26-55 *AALA202608129232* AND THE AIR OIL SEPARATOR REPLACED PER AMM 49-26-54 *AALA202608127582* - A DECONTAMINATION OF THE ECS ACCOMPLISHED PER JOB CARD 26L00021014 WITH NO LEAKS OR ODORS NOTED