What was found
ODOR EVENT DURING DECENT WHILE PASSING THROUGH CLOUDS. MUSTY DRY ODOR, ONLY NOTICED IN COCKPIT, ODOR WENT AWAY AFTER TURNING OFF PACK 1. TROUBLESHOOT THE CAUSE OF COCKPIT ODOR IAW TSM 05-50-00-810-831-A. OPERATED PACK 1. NO ODOR DETECTED. OPS CHECK GOOD.