What was found
DURING CLIMB EMER LIGHTS ILLUMINATED WITH THE EMER LT SWITCH IN THE ARM POSITION. AFTER SOME TIME, THEY BEGAN FLICKERING SPORATICALLY. REMOVE FAULTY FORWARD EMERGENCY LIGHT BATTERY & INSTALLED NEW FORWARD EMERGENCY LIGHT BATTERY. REMOVE FAULTY AFT EMERGENCY LIGHT BATTERY & INSTALLED NEW AFT EMERGENCY LIGHT BATTERY PERFORMED 90 MINUTE CHARGE ON BATTERIES. PERFORMED OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM. OPS CHECK GOOD. WORK COMPLETED IAW AMM 33-52-01.