What was found
LIGHT MUSTY SMELL GOING THROUGH A CLOUD, SMELL WENT AWAY ON ITS OWN, LASTED SECONDS-PERFORMED TSM 21-00-00-810-802-A. R & R PACK 1 RECIRCULATION FILTER. PERFORMED ENG 1 PACK 1 ISOLATION TEST IAW AMM 70-00-00. OPS TEST GOOD. NO DEFECTS NOTED / SMELL NOTED. A/C OK FOR CONTINUED SERVICE.