What was found
DURING APPROACH, THE FLIGHT CREW REPORTED A MUSTY, OILY ODOR IN THE CABIN. FLIGHT CONTINUED, LANDED AND TAXIED TO GATE NORMAL. THE AIRCRAFT WAS GROUNDED. ACCOMPLISHED JC 26L00021001, AND JC 26L00021002. FOUND APU COOLING FAN TO BE SOURCE OF THE CABIN ODOR. REPLACED THE APU COOLING FAN. OPS AND LEAK CHECKED GOOD.