As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 906 21-50 1875141 01MAR19 ROC CLOSE PACK 1 OVER HEAT CAUTION MESSAGE DISPLAYED FOLLOWED BY BURNING SMELL IN CABIN AND FLIGHT DECK. FA REPORTS A HAZE. CYCLED PACK 3 TIMES. SMELL IS ONLY ASSOCIATED WITH PACK 1. FACT 01MAR19 19:07 ROC MX INSP NR 1 PACK AND T/S IAW FIM 21-20-00-810-801-A. FOUND NR 1 PACK ACM FAILED. SEE SEQ 2 BELOW FOR MEL OF NR 1 PACK.