What was found
DUCT PSI FROM ENGINES SPLIT DURING TKOF OR CLB, WITH LT & RT ISOLATION VALVES CLOSED & BLEED SWITCHES ON. LT & RT DUCT PRESS ARE. LT FLUCTUATING BETWEEN 25-55 PSI. RT STEADY AT 55 PSI DURING CLIMB FL320. LT & RT STEADY CRUISE. ACP SHIFT TEST ON NR 1 & 2 ENG. NR 2 ENG FAILS TO REG OFF IDLE 70 PSI AT 72% N2. IDLE PRESS GOOD OPENED ENG FOUND RT PRV VALVE OPEN SWITCH PLUNGER GONE AND SHAFT WORN. REPLACED PRV VALVE PER MM, NO HELP. FAILS TEST. SHOULD REG AROUND 45%. REPLACED M860 BLEED CARD FOR BLEED LIGHT CYCLING, REPLACED NR 2 ENG PRES REG CONTROLLER, RPL PRSOV AND BLOWN PRSOV SENSE LINE IN PYLON. SYSTEM OP CK OK. ENG RUN.