As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING AND STARTING APU, "FAULT" LIGHT ILLUMINATED. GROUNDED - YES. UPON ARRIVING TO AIRCRAFT, STARTED APU FOUR TIMES, ALL FOUR STARTS WERE NORMAL. REF B737-900 FIM 49-60 TASK 801 FOUND "MAINT MSG 49-41010" IN FAULT HISTORY JAN05. CURRENT STATUS SHOW'S "NO FAILURES FOUND". ACCOMPLISHED SUCCESSFUL GROUND VERIFICATION.