What was found
BATTERY PACK NR 1 SEEMS INOPERATIVE. EMERGENCY LIGHTS WON'T TEST IN THE ARM POSITION AT ALL. EMERGENCY LIGHTS ASSOCIATED WITH PACK #1 WILL NOT TEST IN THE ON POSITION. THE EMERGENCY LIGHTS ASSOCIATED WITH THE OTHER BATTERY PACKS ILLUMINATE IN THE ON POSITION. CORRECTIVE ACTION: PERFORMED REPLACEMENT OF THE #1 EMER LIGHT BATTERY WITH A NEW UNIT. CHARGED BATTERY FOR 2 HOURS. PERFORMED OPS CHECK WITH NO DEFECTS NOTED. RESTORED ALL ACCESS GAINED. WORK PERFORMED I.A.W AMM TASK 33-50-00.