As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU START SUCCESSFUL. APU FAULT AFTER INFLIGHT START. TROUBLESHOT IAW TSM 49-62-00. CHECKED LUBRICATION, OIL FILTER AND GENERATOR OIL FILTER DIFFERENTIAL PRESSURE INDICATORS. CHECK OK. PERFORMED APU TEST IAW AMM 49-62 TEST OK. INDICATION NORMAL. UNABLE TO DUPLICATE DISCREPANCY.