As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT PACK AUTO SHUTDOWN IN STBY MODE "NORMAL POS". PERF FIM 21-51-00/101. R & R LT COMPRESSOR DISCHARGE OVERHEAT SWITCH IAW AMM 21-51-19-402-009. ALSO REPLACED LT PACK TEMP CONTROL VALVE IAW AMM 21-51-12-404-013. OPS CK GOOD IN AUTO & STBY. NO FAULTS NOTED. OK FOR SERVICE.