As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN WILL NOT STAY ON LINE. FIELD LIGHT FOR APU GEN LIGHT ON P-61 TRIED MANY TIMES TO RESET, NO JOY. TRIED NEW GCU, NO HELP. FOUND GEN FEEDER CABLES BROKEN AT LUG T2 TERM BLOCK, STUDS ON GEN LOOSE, MAY NEED TO REPLACE 4 LUGS FOR GEN FEEDER CABLES. PULLED CB FOR GEN GCU TAGGED APU START. REPLACED APU GENERATOR. REPLACED FEEDER CABLE DUE TO CABLE BEING BURNED AT GENERATOR.