What was found
NUMBER 1 ENG 9 PSI LEFT BLEED AFTER TAKEOFF PLACARDED #1 ENGINE BLEED PER MEL 3605A, LOCKED #1 PRSOV CLOSED. DISPATCH DESK: 35 TOMC APPROVES PLACARDED #1 ENGINE BLEED INOP PER MEL 3605A, PRSOV NEEDS REPLACEMENT REF AMM 36-11-04. REMOVED AND REPLACED ENG 1 PRSOV REF AMM: 36-11-04. LEAK CHECK GOOD, NO LEAKS NOTED AT THIS TIME. SUGGEST HIGH POWER RUN TO ADD EMP:U413935 VERIFY FIX DUE TO ENG 1 LOW BLEED AFTER TAKEOFF. ACCOMPLISHED ENGINE RUNS NO BLEED FROM #1 ENGINE. ACCOMPLISHED PRSOV HEALTH CHECK REF AMM 36-11-00 FOUND PRSOV CONTROL SENSE LINE WITH LARGE LEAK. REPLACED LIKE REF IPC 36-11-51-02. ACCOMPLISHED ENGINE RUNS AFTER REPLACEMENT ALL BLEEDS NORMAL.