What was found
EMERG LIGHTS FAIL PREFLIGHT TEST. AFM PROCEDURE TO CHARGE LIGHTS DID NOT WORK. EMER LIGHTS DO NOT ILLUMINATE WITH POWER OFF AND SWITCH IN THE ARM POSITION. CORRECTIVE ACTION; ARRIVED AND GAINED ACCESS TO AC. VERIFIED DISCREPANCY. REMOVED EMERGENCY BATTERY PACK PN: CBS28-1 SN: 007245 DUE TO UNSCHEDULED, AND INSTALLED NEW EMERGENCY LIGHT POWER SUPPLY PN: 6430028-1 SN: M24-11648. ALLOWED TIME FOR POWER SUPPLY TO CHARGE. PERFORMED OPS CHECK. OPS CHECK SATISFACTORY AT THIS TIME. ALL WORK DONE IAW CE-700 AMM 33-50-07