What was found
GEN OFF BUS LIGHT AND SOURCE OFF LIGHT ILLUMINTED AT CRUZE GEN WOULD NOT RESET. CREW FOLLOWED THE QRH, UNABLE TO RECONNECT GEN 2 TO THE TRANSFER BUS. DUE TO #2 GEN OFF LIGHT STARTED APU IN FLIGHT AT 37000 , AFTER 3 MINUTES APU INOP LIGHT ILLUMINTED AND APU DROPPED OFF LINE. DID NOT ATTEMPT RESTART. REPLACED #2 ENG IDG REF AMM 24-11-11 OPS CHECK GOOD LEAK CHECK GOOD. PERFORMED FIM 49-60 TASK 801 AND FOUND FAULT 49-91007 LOW OIL PRESSURE. PERFORMED FIM 49-90 TASK 803 AND NO CURRENT FAULTS APU STARTED NORMAL SEVERAL TIMES. REMOVED & REPLACED APU LOW OIL PRESSURE SWITCH. APU OPS CHECK GOOD. REF: AMM 49-94-22. OK FOR SERVICE