As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POOR AIR QUALITY IN THE AIRCRAFT. *S/D* PROBLEM COULD NOT BE DUPLICATED ON GROUND. HOWEVER, WHEN CHECKING LT CONDENSER/REHEATER, IT WAS FOUND CLOGGED. A CLOGGED CONDENSER/REHEATER CAN CAUSE PACK LOW FLOW PROBLEM WHICH MAY CONTRIBUTE TO POOR AIR QUALITY. THE LT CONDENSER/REHEATER WAS REPLACED. AIRCRAFT WENT BACK TO REVENUE SERVICE WITHOUT FURTHER POOR AIR QUALITY PROBLEM.