As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE THE AIR CONDITIONER WAS RUNNING, THE CREW REPORTED INADEQUATE COOLING AND A FAINT ODOR OF SOMETHING BURNING. MAINTENANCE FOUND THE AFT EVAPORATOR FAN WAS BARELY RUNNING. AFTER REPLACING THE FAN, THE OLD FAN'S COVER WAS REMOVED AND A BIG PILE OF BRUSH DUST POURED OUT.