What was found
DURING START SEQUENCE EMER LT NOT ARM YELLOW CAS MESSAGE IS DISPLAYED WITH SWITCH IN ARMED POSITION. PERFORMED EMER LT NOT ARM YELLOW CAS MESSAGE TROUBLE SHOOTING FOLLOWING FIM FAULT CODE 333500100, FOUND EMERGENCY BATT NR 2 BAS, AS PER STEP "3" OF FIM. PERFORMED REPLACMENT EMERGENCY LIGHTS BATTERY NR 2 WITH NEW UNIT, IAW P-300 AMM 33-52-01. PERFORMED EMERGENCY BATTERY OPERATIONAL TEST, IAW P-300 AMM 33-52-01. PERFORMED EMERGENCY LIGHTS OPERATIONAL TEST, IAW P-300 AMM 33-52-00. NO DEFECTS NOTED. NO CAS MESSAGE WHEN SWITCH IS IN ARMED POSITION.