What was found
FLIGHT CREW REPORTED BURNING SMELL IN COCKPIT DURING FLIGHT FOR APPROX 1 MINUTE. INSPECTED COMPRESSOR R2 AND FOUND NO ACRID SMELLS. DURING TROUBLESHOOTING OF CAC MESSAGE. RAN RIGHT CAC ON BOTH COMPRESSORS 1 AND 2 FOR OVER AN HOUR WITH NO SMELLS NOTED. FOUND CMSC R2 CAC TO BE INOPERATIVE. SEE REFERRED LOG PAGE FOR MAINTENANCE PERFORMED IN COMPONENT REPLACEMENT. CONFIRMED WITH TOMC THAT THIS SATISFIES CORRECTIVE ACTION. NO FURTHER DISCREPANCIES NOTED.