As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN OFF BUSS LIGHT ILLUMINATED WITH APU SWITCH IN OFF POSITION. ACFT GROUNDED. ACCOMPLISHED APU BITE PROCEDURE IAW AMM 49-61-00-700-801. NO FAULTS NOTED. INITIATED THREE START & SHUTDOWNS - ALL SUCCESSFUL. CHECKED APU INPUT MONITORING, ALL SWITCH POSITIONS CONCUR. OK FOR SERVICE.