What was found
IN ACCORDANCE WITH TSM TASK 24-20-00-810-900-A, STEP A, ELECTRIC CHECK WAS PERFORMED. IDG PIN A9 TO IDG CASE - NO SHORT CIRCUIT IDG PIN A9 TO A10 - 8.92 OHM IDG PIN A9 TO GCU C12 - 1,21 OHM IDG PIN A10 TO GCU C13 - 1,22 OHM GCU PIN C12, C13, AND C7, NO SHORT CIRCUIT WAS FOUND, ALSO WAS PERFORMED ISOLATION TEST, 550 MOHM (500V). IN ACCORDANCE WITH AMM TASK 24-22-34-000-001/400-001, THE GCU 1 WAS REPLACED, CFDS TEST SATISFACTORY. IN ACCORDANCE WITH TSM TASK 24-20-00-810-900-A, IDLE CHECK WAS PERFORMED, NOT SATISFACTORY, GEN 1 FAULT ON ECAM AGAIN. NEXT STEP REPLACE IDG 4000XU ENG 1. THE IDG #1 WAS REMOVED AND REPLACED IN ACCORDANCE WITH AMM 24-21-51-000-040-B/400-040-B. TEST WAS PERFORMED IN ACCORDANCE WITH AMM 24-21-00-720-041 SATISFACTORY.