What was found
LAS FLT 971 EN ROUTE, BOS TO LAS. APPROXIMATELY 380 NM FROM LAS, THE APU AUTO SHUTDOWN WITH THE NUMBER TWO IDG WAS INOPERATIVE ON MEL. SINCE THERE WAS NO SUITABLE DIVERSION AIRPORT CLOSER, THE FLIGHT CONTINUED TO LAS AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE SERVICED THE APU. OPERATIONALLY CHECKS OK.