As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS DURING A SCHEDULED 1C/2C INSPECTION THE BACK-UP BATTERY FAIL THE FUNCTIONAL CHECK. MAINTENANCE REMOVED AND REPLACED THE BACK-UP BATTERY IAW EMB-145 AMM 24-35-01 AND THE FUNCTIONAL CHECK WAS GOOD IAW EMB 145 AMM 24-35-01-700-801 A. ALL WORK WAS ACCOMPLISHED AND WILL BE RELEASED UPON COMPLETION OF ALL WORK.