As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/T ARM GREEN LIGHT ON MCP INOP. UNABLE TO DUP/VERIFY DISCREP. W/ A/T ENGAGED A/T ARM GREEN LIGHT ILLUMINATES WILL INCREASE AND DECREASE W/CAPT'S MAIN PANEL BACK GND LIGHTING RHEOSTAT ADJUSTMENT. A/T CURRENT STATUS TEST GOOD. NO FLT FAULTS. CAT STATUS REMAINS CAT IIIA AUTOLAND AND HGS.