As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIA - FLT 7121 - ELECTRIC SMOKE INDICATION ON CCAS ACCOMPANIED BY SMOKE IN FORWARD CABIN AND FORWARD CARGO. MAINTENANCE DEFERRED LEFT PACK SYSTEM. MAINTENANCE REMOVED AND REPLACED LEFT ENGINE. PERFORMED GROUND RUNS, OPERATIONAL CHECK GOOD, DMI CLEARED. (X)