As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA - BOS FLT 2139 (DIRTY SOCK) SMELL WHEN T/O POWER WAS APPLIED DID NOT GO AWAY PWR REDUCTION SHUT DOWN NR 1 PACK + BLEED SMELL WENT AWAY SMELL WAS THROUGHOUT CABIN. MAINTENANCE ACCOMPLISHED CABIN AIR QUALITY TROUBLESHOOTING AND REPLACED RECIRCULATION AIR FILTERS.