As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON TAKEOFF AND SHORT FINAL EMERGENCY LIGHTS FLASHED ON AND OFF. MAINTENANCE PERFORMED TSM 33-51-00-810-802-A AND FOUND A FORWARD EMERGENCY POWER SUPPLY UNIT BATTERY FAULT MESSAGE. MAINTENANCE REPLACED THE BATTERY FOR THE FORWARD EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-38 AND ACCOMPLISHED A A SATISFACTORY OPERATIONAL CHECK