As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSY INFLIGHT - CREW REPORTED AT FL340 FLOW ON BOTH AIR CONDITIONING PACKS REDUCED TO ZERO FLOW FOLLOWED BY CABIN PRESSURE CLIMB. FLOW CAME BACK TO NORMAL WHEN DESCENDING THROUGH LOW TEENS. LANDED MSY WITHOUT INCIDENT. NO FAULTS FOUND. SUSPECT BOTH PACKS FROZEN WITH MOISTURE. REPLACED BOTH PACK COALESCER BAGS. SYSTEM GROUND CHECKED NORMAL OPERATION.