What was found
ON TAXI OUT, LEFT ENGINE EICAS LEFT ENGINE START AND OVERHEAD VALVE LIGHT ILLUMINATED DURING START. ACFT RETURNED TO BLOCKS (BTB). CYCLED START VALVE AND ACCOMPLISHED NR 1 ENGINE START IAW AMM 71-00-00, NO FAULTS NOTED DURING ENGINE START A/C REMAINS NO ETOPS. AIRCRAFT RETURNED TO SERVICE. (NOTE: MAINTENANCE REMOVED AND REPLACED THE LT ENGINE START VALVE IAW AMM 80-11-02 ON CLEARING DI FROM PREVIOUS REPORT SENT ON ABXA2026127030 FOR 1013A).