As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK DEFERRED. RIGHT PACK HIGH TEMP AND SHUTDOWN. CREW DEPLOYED O2 MASKS AND DECLARED EMERGENCY. RETURNED TO FIELD. R & R RT PACK OVER TEMPERATURE COMPRESSOR SWITCH IAW AMM. OPS CHECK GOOD AT THIS TIME. PN ON 750659-17AEC, SN ON 0093, PN OFF 750659-17AEC, SN OFF 000201.