What was found
AFTER LANDING, NOTICED HEAVY FUMES IN CABIN. WENT BACK TO HELL HOLE & FOUND THIN SMOKE TO BE IN THE AREA. STRONG FUMES PRESENT. INSPECTED TAILCONE AREA & FOUND ACFT PALLET DRIVE MOTOR APPEARS TO BE BURNED & FREON SYS IS INOPERATIVE. REMOVED AIR COND PALLET ASSEMBLY. REMOVED DRIVE MOTOR. INSTALLED EXCHANGE AC DRIVE MOTOR IAW CMM 21-00-05. INSTALLED NEW DRIVE BELT. COMPLIED WITH DRIVE BELT TENSION & TRACKING CHECK IAW CMM 21-00-05. OPS CHECKED GOOD. INSTALLED AIR COND PALLET ASSEMBLY IAW MM 21-52-00.