As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RH PACK EXCESSIVE TEMP IN FLIGHT, LH-RH PACK BAY NEEDS INSPECTION FOR POSSIBLE BLEED OR PACK LEAKS. GROUNDED - YES. PERFORMED BITE TEST OF R/H PACK TEMPERATURE CONTROLER (M14437) AND TORQUE CHECK OF THE RH PACK ACM REF B737-800 FIM 21-62 TASK 849. BITE TEST RESULTED IN A "THIS PACK- TCV" LIGHT ON BITE AND PREV FLT. DISPLAYED GREEN LIGHT ON VERIFY. REPLACED PRIMARY AND SECONDARY HEAT EXCHANGERS ON THE R/H PACK. REPLACED PRIMARY PLENUM AND DIFFUSER. REF B737-800 AMM 21-51-03-400-804-002. NO LEAKS NOTED.