As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN COCKPIT DURING APPROACH. MUSTY SMELL. TURNED PACK 1 OFF AND THE SMELL WENT AWAY.-PERFORMED TSM 05-50-00-810-831-A. PERFORMED GVI OF ENGS & APU IAW AMM 49-16-00 & 71-00-00 NO LEAKS NOTED RAN BOTH ENGS & APU BLEED TO ISOLATE PACK 1 & 2 NO ODORS PICKED UP BY AERO TRACER DURING RUN UABLE TO DUPLICATE.