What was found
AQE AIRBOURNE. PACK 1 ISOLATED AND SMELL WENT AWAY. AT TIME OF EVENT HIGH POWER CLM 8000FT-REF TSM 05-50-00-810-831-A PACK 1 CONFIRMED WITH SMELL AND PACK 2 CHECKED OK WITHOUT ODOR. PACK 1 WILL BE PLACED ON MEL. AIRCRAFT OK FOR SERVICE. MOC # 70473 DESCRIPTION OF FUMES/ODOR: MUSTY DRY. PERSISTENT. APPARENT SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK, MID CABIN. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.