What was found
DURING FLIGHT ON THE ARRIVAL NOTICED THE EMERGENCY LIGHTS FLASHING ON AND OFF IN THE CABIN AND PROCEEDED TO FLASH UNTIL LANDING. REMOVED AND REPLACED NR 1 EMERGENCY BATTERY WITH CUSTOMER PROVIDED REPAIRED PART. OPS CHECK GOOD AT THIS TIME. NO DEFECTS NOTED. ALL WORK PERFORMED IAW AMM 33-52-01. DUE TO EMERGENCY LIGHTS FLICKERING. REMOVED AND REPLACED NR 2 EMERGENCY BATTERY WITH CUSTOMER PROVIDED REPAIRED PART. OPS CHECK GOOD. ALL WORK PERFORMED IAW AMM 33-52-01.