What was found
MUSTY SMELL ON TAKEOFF AND LANDING IN CABIN AND COCKPIT ON CREW DEBRIEF STATED ODOR WAS ONLY PRESENT IN THE FLIGHT DECK. FA AND PAX DID NOT SMELL ANYTHING. MILD ODOR WAS PRESENT THOUGH TO AND THEN DISSIPATED FOR THE REST OF THE FLIGHT BUT CAME BACK ON LANDING AND WENT AWAY AGAIN. RAN PACKS FOR 30 MIN WITH NO ODOR SENSED ANY WHERE ON THE AC. INSPECTIONS ACCOMPLISHED REF AMM 05-51-26.