As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK 1 VALVE FAIL-C/A-FLT CREW PLACARD PACK 1 IAW MEL 21-30 AUTH # 100481D-C MOC # 624980. REMOVED AND REPLACED RELAY K0187 IAW EMB AMM 20-13-02-000-801-A AND 20-13-02-400-801-A PER KVA. NO FIX. FOUND PACK 1 OVERTEMP ON CMC. T/S PER FIM 21-51-00-810-823-A. FOUND PACK VALVE TO BE BAD. RAR PACK VALVE IAW EMB AMM 21-51-01-000-801-A AND 21-51-01-400-801-A. OPC LEAK CHECK GOOD AT THIS TIME. MEL RESTORED. END.