As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND APU FAULT, MAINT MESSAGE 49-52219, NO FLIGHT DECK LIGHT. INLET PRESSURE SENSOR DISAGREES WITH BUS DATA. FOR 17 STARTED LOGGED. ACFT GROUNDED. APU ELECTRICAL HARNESS CHANGED AS A PRECAUTION IAW AMM 49-11-01/401. HAVE PREVIOUS HISTORY OF APU HARNESS CAUSING THIS FAULT DUE TO INTERNAL CORROSION. GROUND FUNCTIONAL CHECKED NORMAL.