What was found
DURING PUSH BACK, CAPTAIN REPORTED THAT AFTER STARTED THE LEFT ENGINE, THE CSD LIGHT TURNED ON AND TEMPERATURE REACHED 150 DEGREES CELSIUS, SO ABNORMAL PROCEDURE WAS ACCOMPLISHED. MAINTENANCE PERSONNEL DETECTED THE LEFT CSD OIL LEVEL IN RED RANGE, SO THE EXCESSIVE OIL WAS DRAINED UNTIL YELLOW RANGE. DURING TRANSIT CHECK AT MEX, THE LEFT CSD AND OIL EXCHANGER WERE REPLACED IAW MM 24-13-01 AND 24-14-01, TESTED CORRECT.