What was found
DUCT PRESSURE INDICATION L AND R POINTERS NOT THE SAME (SPLIT), WITH EITHER POINTER BELOW 18 PSIG DURING TAKEOFF, CLIMB AND CRUI SE; THE ENGINE IS THE BLEED SOURCE REMOVED AND REPLACED THE #2 ENG BLEED AIR REGULATOR (BAR) COMPLIED WITH. IAW AMM 36-11-03. STILL REQUIRES (SUPPLY PRESSURE UPSTREAM OF THE PRSOV TASK 36-00-00-860-805).PARTS USED: 29-3611-9-0005,QTY :1 PARTS CHANGE WAS INDICATED - TT # 1525119 SN OFF 8778 REGULATOR, BLEE OFF 29-3611-9-0005 8778 ON 29-3611-9-0005 2409 REMOVED AND REPLACED #2 ENG FIFTH STAGE CHECK VALVE COMPLIED WITH. WORN AND CORRODED AT HINGE. IAW AMM 36-11-02. STILL REQUIRES (SUPPLY PRESSURE UPSTREAM OF THE PRSOV TASK 36-00-00-860-805).PARTS USED: 29-3611-9-9002,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1748673 SN OFF 3157 VALVE, CHECK, F OFF 29-3611-9-9002 3157 ON 29-3611-9-9002 5425 REMOVED AND REPLACED #2 ENG PRECOOLER CONTROL VALVE COMPLIED WITH. IAW AMM 36-12-02. STILL REQUIRES (SUPPLY PRESSURE UPSTREAM OF THE PRSOV TASK 36-00-00-860-805).PARTS USED: 99-3611-3-0013,QTY :1 29-3612-9-0008,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1512717 SN OFF 9813 VALVE, PRECOOLE OFF 29-3612-9-0008 9813 ON 29-3612-9-0008 0659 PERFORMED OPS/LEAK CHECK ON BLEED AIR REGULATOR, PRECOOLER CONTROL VALVE, 5TH STAGE CHECK VALVE , REF AMM 36-00-00-860-805. OPS LEAK CK GOOD. PERFORMED HIGH POWER RUN, ALL ENGINE PARAMETERS NORMAL REF AMM 71-00-00. OK FOR SVC.