What was found
GRU - FLT 0006 - LEFT GENERATOR DRIVE LIGHT STAYED ON AFTER ENGINE START. GENERATOR CONT LIGHT OFF. LT IDG DEF INOPERATIVE PER MEL 24-01 AUTH 4-233DC-B. CHECKED IDGS/APU OIL LEVELS AND HISTORY. NO HISTORY. FLIGHT CREW ADVISED TO DISCONNECT. MIC SHEET ENTERED. REMOVED AND REPLACED NR 1 ENGINE IDG. PERFORMED ALL CHECKS PER MM. ALL CHECKS OK. REMOVED PLACARD 24-01 AUTH 4-233DC-B AND CLEARED MIC SHEET. (X)