What was found
PDIS 937 29-30 1782 24FEB23 ONT FACT U LOGPAGES:381829 ON PUSH BACK IN ONT WE STARTED THE LEFT ENGINE AND THEN THE RIGHT ENGINE. ONCE THE RIGHT ENGINE STARTED WE RECEIVED " R HYD SYS PRESS" EICAS, AND "SYS PRESS" DISCRETE LIGHT, AND "BRAKE SOURCE" LIGHT. FACT 25FEB23 03:21 ONT ASM: 33-16-01 AFTER CHANGING S415 AS A PRECAUTIONARY CLEANED CONNECTORS AND RECEPTACLES ON HYDRO CONTROL PANEL AND MASTER DIM AND BRIGHT PANEL. RAN LEFT AND RIGHT ENGINES PER B757 JRH BY. ALL PAREMETERS CHECK GOOD. NO ABNORMALITIES. A/C OK TO CONTINUE.