What was found
NR 1 IDG CAUTION MESSAGE DURING FLIGHT, PILOT ACARS IN THAT NR 2 IDG MESSAGE WAS ILLUMINATED IN FLIGHT FLICKERING AND INTERMITTENTLY. GENERATOR STAYED ONLINE. ALSO TO NOTE NR 1 IDG WAS PREVIOUSLY DEFERRED. PILOT DECLARED EMERGENCY AND LANDED AT SCHEDULED AIRPORT. NR 2 IDG OUTPUT WAS 8KVA, 112V, 402HZ. SWAPPED NR 1 GCU INTO NR 2 POSITION. NR 2 IDG OUTPUT- 7 KVA, 116V, 401HZ. OPS CHECKED NR 2 IDG FOR 45 MINS. CONTINUOUSLY IAW AMM 24-11-01. NO DEFECTS NOTED. OK FOR SERVICE.