As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RH AIR CYCLE MACHINE DOES NOT ROTATE FREELY. UNIT IS HIGH TIME. GROUNDED - YES. REMOVED RH AIR CYCLE MACHINE. EXCHANGED FITTINGS TO NEW ACM. REF B737-800 AMM 21-51-04-000-802-002. INSTALLED SERVICEABLE AIR CYCLE MACHINE OP AND LEAK CKS GOOD REF. B737-800 AMM 21-51-04.