As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED A FAINT MUSTY ODOR IN FLIGHT DECK DURING DESCENT FOR ABOUT TWO MINUTES AT 5000' APU OFF. ENG. BLEEDS ON. MAINTENANCE FOUND THE APU OIL COOLING FAN LEAKING AND REPLACED IT. A SATISFACTORY LEAK / OPERATIONAL CHECKM WAS ACCOMPLISHED.** (CLOSED)