What was found
GEN 2 FAULT DISPLAYED ON UPPER ECAM. INSTALLED GCU, GOT GOOD VOLTS AND FREQS, BUT STILL WOULD NOT COME ONLINE. IDG OIL LEVEL GOOD. RE-INSTALLED OLD GCU AND DEFERRED REF MEL 2420D. INF- :PRIOR TO CLEARING THIS DF ITEM AND RESTORING IDG TO SVC, PYLON MOUNTED IDG CONN MUST BE VISUALLY INSP FOR ARCING (REF MT 24-002D), PER AD2011-19-01 R1 REQUIREMENTS. RPL- :GEN ON OFF SWITCH ON 35VU PANEL, ACP PYLON MOUNTED IDG CONN CHECK REF MT 24-002D AND ACP OPS CHECK IAW MM 24-21-00-720-042 VOLTS 114 HZ 415 ALL WITHIN LIMITS OPS CHECK NORMAL.