As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TROUBLESHOOTING OF AN INOPERATIVE AUXILIARY POWER UNIT (APU) ASSOCIATED WITH AN APU FAULT CAUTION MESSAGE, SIGN OF OVERHEATING CONDITION WAS NOTICED AT THE APU STARTER POSITIVE ELECTRICAL LUG. AIRCRAFT DEFERRED IN ACCORDANCE WITH MEL 49-10-01-1.