What was found
ATL - ABORTED TAKEOFF - FLT 0615 - ON TAKEOFF OUT OF ATL EN ROUTE FOR PHX AT APPROXIMATELY 70 KTS THE NR 2 GENERATOR FAULTED OFF LINE, REJECTED TAKEOFF AND RETURNED TO GATE. CONTRACT MAINTENANCE MADE LOG BOOK ENTRY FOR MEL 24-20-01, COND. 2 - NR 2 INTEGRATED DRIVE GENERATOR (IDG) INOPERATIVE AND AIRCRAFT DEPARTED FOR PHX. AT PHX MAINTENANCE TROUBLESHOT WIRING TO IDG CHECKING PINS 12, 13, & 14 FINDING NO DEFECTS. REMOVED AND REPLACED NR 2 GENERATOR CONTROL UNIT PER AMM 24-22-000-001. PERFORMED ENGINE RUN OPERATIONAL CHECK ON NR 2 ENGINE, NO DEFECTS NOTED. **SUPP** VENDOR BENCH TEST OF GENERATOR CONTROL UNIT S/N 6697 CONFIRMED FAILURE, UNIT FAILED INCOMING TEST TS5221 ISOLATING FAILURE TO THE A2PWBA R43 EXCITER F