As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GENERATOR FEEDER CABLES BULKHEAD CONNECTOR DISCONNECTED. WIRES FOUND BURNED AND WELDED TOGETHER. APU GCU CIRCUIT BREAKER COLLARED. INSTALLED APU GEN CABLE 6F16610-501 HARNESS FROM GEN TO BULKHEAD REF MM 24-21-01-409. DISCONNECTED HARNESS IN STAB COMPARTMENT. REPLACED BULKHEAD CONNECTOR PER SWP20.62.26. RESET APU GCU CIRCUIT BREAKER. REMOVED ALL LOCKOUT TAGS. OPERATED APU GEN PER AMM, OPS NORMAL.