What was found
AFTER TAKEOFF INFLIGHT CREW REPORTED EMERGENCY EXIT LIGHTS ILLUMINATED. FLIGHT DECK SWITCH MOVED FROM ON TO OFF AND BACK TO ARMED, LIGHTS REMAINED ILLUMINATED. REPLACED BATTERY PACKS M9001, M731, M735, M9002 AND M737 AND FOUND CHARGING CB TO BE FAULTY, REPLACED CB. OPERATIONAL CHECK GOOD.