As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED RECEIVING A RIGHT HAND PACK OVERHEAT (TEMP) CAUTION MESSAGE WHILE SMELLED SMOKE IN THE CABIN DURING TAXI-IN TO THE GATE. MAINTENANCE INSPECTED AND DEFERRED THE RIGHT HAND PACK PER MEL 21-51-01 -C- OPT 1. MAINTENANCE TROUBLESHOT THE RIGHT HAND PACK SYSTEM. MAINTENANCE REMOVED AND REPLACED THE ACM CHECK VALVE IN ACCORDANCE WITH THE AIRCRAFT MAINTENANCE MANUAL 21-52-07-000/400-801. OPERATIONAL CHECKS WERE PERFORMED. AIRCRAFT WAS RELEASED FOR SERVICE.