What was found
APU NO START AFTER LANDING. APU DOOR STATUS LIGHT ON. REMOVED AND REPLACED APU BATTERY PER AMM. WHILE TROUBLESHOOTING APU BATTERY VOLTAGE DROPPED TO ZERO WHILE ATTEMPTING TO START.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
APU NO START AFTER LANDING. APU DOOR STATUS LIGHT ON. REMOVED AND REPLACED APU BATTERY PER AMM. WHILE TROUBLESHOOTING APU BATTERY VOLTAGE DROPPED TO ZERO WHILE ATTEMPTING TO START.