As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK MODE RT PACK AIR CYCLE MACHINE HAS FAILED, OR RT ECONOMY COOLING VLV FAILED OPEN, OR BOTH RT CONDENSER INLET TEMP SENSORS FAILED. RT PACK IS OPERATING IN A NON NORMAL MODE HEAT EXCHANGER ONLY COOLING MODE. REPLACED RT PACK LOW LIMIT VLV IAW AMM. DUE TO MATERIAL INTERROGATION MESSAGE. OPERATED MAINT GROUND SYSTEM TEST AIR ON, PASSED ALL PARAMETERS RT PACK CHECKED NORMAL