As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK MODE R RIGHT PACK AIR CYCLE MACHINE HAS FAILED, OR RIGHT ECONOMY COOLING VALVE FAILED OPEN, OR BOTH RIGHT CONDENSOR INLET TEMP SENSORS FAILED. RIGHT PACK IS OPERATING IN A NON-NORMAL MODE (HEAT EXCHANGER ONLY COOLING MODE). ADVISORY CREW COMMENTS: PACK MODE R. FOUND LOW LIMIT VALVE FAULTY. REPLACED LOW LIMIT VALVE. OP CHECK GOOD. AC OK FOR SERVICE.