What was found
FLT#76, MSY-JFK. 'STRONG MUSTY ODOR DESCENDING THROUGH 6,000 SOURCES WAS THE AIR VENTS IN THE FLIGHT DECK. PERFORMED ODOR ISOLATION PROCEDURE. THE ODOR STOPPED AFTER TURNING OFF PACK #1 (ABOUT 3,000 FEET); COMPLIED WITH INFO NOTICED 2017-T015, SECTION A, ISOLATED FAULT TO TYPE 5(B) PER TSM 05-50-00-810-831-A. PERFORMED LEVEL A DECONTAMINATION OF ECS IAW AMM 21-00-00-615802 AS PRECAUTIONARY. A/C OK FOR SERVICE. NO PREV HISTORY.'