What was found
RIGHT BUS FAILED, RESET VIA QRH, FAILED A SECOND TIME. PER CREW WHILE DESCENDING FROM 180 WHEN TURNING ON THE LANDING LIGHTS THE RT BUS FAILED. WHEN MX WENT TO DEBREIF THE CREW FOUND BOTH LT & RT BUSES OFF AND AC WAS ON STANDBY POWER, PER FIM 24-41 FT 805. RESET BOTH BUSES AND BITE THE BPCU, PER 24-20 FT 801, NO FAULTS NOTED. RAN BOTH ENGINES TO DO AN IDG LOAD TEST, PER AMM 71-00-00 AND AMM 24-11-00, NO FAULTS NOTED.