As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK NOT PUTTING OUT COLD AIR. ACFT WILL NOT COOL DOWN. ON GND LEFT PACK OUT TEMP 40 VS 0. *S/D* RIGHT PACK CONTROL BITE BOX SHOWS TEMP CONTROL VALVE AND LOW LIMIT VALVE FAULTS. REPLACED BOTH UNITS PER MM 21-51-12 AND MM 21-51-11. RIGHT PACK LEAK CHECKS OK. AC OK FOR SERVICE.