As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, THAT THE RIGHT AIR CYCLE MACHINE ONLY BLOWS HEAT, SMELLED AN ELECTRICAL SMELL WITH BLEEDS ON AND PASSENGERS REPORTED A GRINDING SOUND IN THE BACK OF THE AIRCRAFT. MAINTENANCE FOUND THE RIGHT AIR CYCLE MACHINE SEIZED. REPLACED THE RIGHT ACM AND RETURNED THE AIRCRAFT TO SERVICE WITH NO FURTHER PROBLEMS.