As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GND POWER RECEPTACLE SUPPORT IS CRACKED AT INBD AFT SIDE. THE EXTERNAL GND POWER RECEPTACLE SUPPORT WAS REPLACED IAW SRM 51-42-06 & 51-42-21. RT DOOR WAS DISCONNECTED AT CONTROL ROD. RECONNECTED & CHECKED GOOD IAW AMM 32-22-15-400-801. PERFORMED APU REMOTE SHUTDOWN IAW AMM 49-10-00-800-804 AS DETAILED ON MWC, STEPS 1 - 9.