As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT PACK PRIMARY TEMP CONTROLLER INOPERATIVE. ACFT GROUNDED. PERFORMED A PACK/ZONE TEMP CONTROLLER BITE IAW AMM 21-61-00-700-806-002. NO FAULTS NOTED. NOTICED THAT THE RT PACK PRIMARY TEMP CONTROL VALVE WAS MOVING SLOWER THAN NORMAL, WITH AN ABNORMAL GRINDING NOISE. REPLACED THE RT PACK PRIMARY TCV IAW AMM 21-51-10/401. THE NEW TCV OP-CHECKS AND LEAK CHECKS GOOD IAW SAME REFERENCE. THIS CLEARS MEL 21-32B.