As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MHT FLT 2190 THE CREW REPORTED SMOKE IN LAV AND THE CABIN HAD A ELECTRICAL SMELL. THE AIRCRAFT DIVERTED INTO BOS AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND RAN ENGINES AND PERFORMED BLEED AIR SYSTEM OPERATIONAL CHECKS. NO SMOKE OR ELECTRICAL SMELL WAS NOTED AND OPERATIONAL CHECKS WERE GOOD.