What was found
BOS - FLT 4855 - DURING FLIGHT, THE RIGHT LOW PRESSURE BLEED VALVE WAS NOT FUNCTIONING AND STUCK OPEN. AIRCRAFT RETURNED TO BOS. AFTER TROUBLESHOOTING MAINTENANCE, FOUND THE CONNECTOR AT THE RIGHT BLEED VALVE LOOSE. THE CONNECTOR WAS RESECURED, REQUIRED OPERATIONAL CHECKS WERE PERFORMED, AND THE AIRCRAFT WAS RETURNED TO SERVICE. (X)