As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK OPERATES NORMALLY, BUT INTERMITTENTLY BEGINS TO OVER TEMP RAPIDLY WITH A CORRESPONDING BURNING SMELL NOTICED IN THE COCKPIT. PACK EVENTUALLY HAD TO BE SHUT DOWN. REMOVED AND REPLACED LEFT PACK MIX VALVE INDICATOR. OPS CHECKED GOOD PER 21-61-0.