As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT ILLUMINATED ON START CONTINUED TO BE ILLUMINATED AFTER SWITCH PLACED OFF. REPLACED STARTER/GENERATOR OIL FILTER AND LUBE FILTER ELEMENT AS PER AMM 49 91 12. INSPECTED MAGNETIC DRAIN PLUG AS PER 49 91 81 NO METAL PARTICLES NOTED. OPERATE APU FOR FIVE MINUTES NO SIGNS OF OIL LEAKAGE NOTED. PERFORMED APU BITE TEST AS PER AMM 49 61 00. OPS NORMAL.