As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT ON GROUND AFTER LANDING. PERFORMED FIM 49-11 FAULT TREE 988. APU STARTED OK AFTER FIRST ATTEMPT. REMOVED AND REPLACED APU BATTERY CHARGER FOR PRECAUTIONARY PER AMM 24-31-05, OPS CHECK GOOD. APU GROUND VERIFICATION OK. NO TIME INFO FOR UNIT.