What was found
FLT 220, SAN-BOS. FROM TAKEOFF ANDDURING CLIMB WE NOTICED A DIRY SOCK / LOCKER ACRID SMELL . THE SMELL WAS ONLY EVIDENT IN FLIGHT DECK WE COMPLETED THE FUME CHECKLIST. AFTER ISOLATING PACK 1 THE ODOR GREATLY SUBSIDED ( PACKS ); DEACTIVATED THE AIR CONDITION PACK (10HM) PER AMM TASK 21-51-00-040-002. COMPLIED WITH INFO NOTICE 2015-T015 STEPS 1 AND 2. IDENTIFIED ODOR TO PACK 1. LEVEL A WAS ACCOMPLISHED PER AMM 21-52-00. PACK 1 PLACED MEL 21-52-01A CAT C. MX-4 UPDATED PLACARD INSTALLED. (SUPPLEMENTAL INFORMATION TO FOLLOW)