What was found
ON BASE LEG, SELECTED GEAR DOWN AND FLAPS 15, LOST ALL ELECTRICAL POWER, INCLUDING STBY PWR, HAD NO COMM/NAV. FLEW WITH STBY INST ON LANDING BLEW NR 1 TIRE DUE TO NO ROTATION. REPLACED NR 1 GCU P/N 948F458-2 S/N NF4063, NR 2 GCU S/N 3934, BATT P/N 23168 S/N 13163, BATT CHARGER P/N 2-301-3 S/N 1776. NR 1 BUS TIE BKR P/N 9410335-4 S/N NF6911, NR 2 BTB S/N ZH9271. NR 1 GEN BKR P/N 9410335-4 S/N 6811, NR 2 GEN BKR S/N YE6831, APU BKR S/N ZH9252, BATT CHRGR RELAY R-39, APU START INTERLOCK RELAY R-89, AND TRANSFER RELAYS R-3 AND R-4. ALL CHECKS OK ON TEST FLT PER TOPPS.