What was found
DURING ENGINE START AND TAXI, L ENG GEN DRIVE & DISC. CREW RETURNED TO THE GATE (BTB). MTC DEFERRED LT ENGINE IDG IAW MEL 24-00-1-1. MBCB 09/24/26. REF ITEM 2, GEN DRIVE LIGHT INOP. MBCB 09/24/26. ACFT REMAINS NO ETOPS. ACFT RETURNED TO SERVICE.