What was found
BLEED PRSOV R RIGHT ENGINE BLEED PRESSURE REGULATING SHUT OFF VALVE (PRSOV) FAILED OPEN OR CLOSED OR RIGHT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG01- LATCHED DESCENT MODE DEPENDENT; PRESS REGULATING AND SOV (RIGHT) FAILED CLOSED. DB- AIR SUPPLY & CABIN PRESSURE CONTROLLER (R) MSG02- LATCHED DESCENT MODE DEPENDENT; PRESS REGULATING AND SOV (RIGHT) FAILED CLOSED. SUPPLEMENTAL DATA UPDATE LOCKED PRSOV IN CLOSED POSITION. (PARTS: 646-9036 MR36086 VALVE AY). REPLACED NR 2 ENGINE PRSOV PER MM, OPS CK GOOD.