What was found
APU GENERATOR DROPS OFF LINE AFTER FOUR OR FIVE MINUTES OF OPERATION. FOUND OVERHEAT CONDITION FOR GENERATOR FEEDERS CABLES. *S/D* AREA OF OVERHEAT WAS AT THE CABLE APU GENERATOR POWER PHASE LEAD TERMINAL INTERFACE. SUFFICIENT RESISTANCE WAS PRESENT TO CAUSE HEATING AND EVENTUAL FAILURE OF THE ELECTRICAL/MECHANICAL CONNECTION. LIKELY CAUSES CONTRIBUTING TO THE HIGH RESISTANCE INCLUDE THE HARDWARE ON THE POWER FEEDER CABLE PHASE TERMINATION AND/OR TORQUE VALUE ON THE NUT SECURING POWER FEEDER CABLE. PROCEDURES/IPC UNDER REVIEW BY UA/BOEING. ALERTS ISSUED BY UA.