What was found
ON TAXI, DUCT TEMP WENT FULL HOT WITH ASSOCIATED SMELL AND FUMES. TURNED OFF BLEEDS AND STOPPED ODOR WITH DUCT TEMP GOING DOWN. MECHANIC REPORTS ACM NOT WORKING WITH EITHER ENGINE OR APU BLEED AIR, VERY HOT TO TOUCH. R & R ACM AND COMPLIED WITH HEAT EXCHANGER INTERIM CLEANING IAW WC 21-50-06, RAN BLEEDS AND OBTAINED GOOD AIRFLOW WITH DUCT TEMPS OF 9 DEGREES, OPS CHECKED GOOD.