What was found
CREW REPORTED A RIGHT ENGINE BLEED AMBER CAS MESSAGE AND A RIGHT ENGINE COWL MESSAGE AFTER TAKEOFF FROM CLT. AIRCRAFT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE WAS UNABLE TO DUPLICATE THE FAULT. MAINTENANCE SWAPPED THE RIGHT PRESSURE REGULATING AND SHUTOFF VALVE (PRSOV) WITH THE LEFT PRSOV FOR TROUBLESHOOTING PURPOSES AND PERFORMED OPERATIONAL CHECKS IAW THE AIRCRAFT MAINTENANCE MANUAL. NO DEFECTS WERE NOTED. AIRCRAFT WAS RELEASED FOR SERVICE. NO FURTHER DEFECTS HAVE BEEN NOTED SINCE THE FLIGHT.