What was found
AIRCRAFT WAS GROUNDED: CABIN EMERGENCY LIGHTS DO NOT AUTOMATICALLY ILLUMINATE WITH LOSS OF POWER - WORK MANUALLY. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 12WL (AALA202209234788) PER AMM 33-51-38. REPLACED BATTERIES IN EMERGENCY POWER SUPPLY UNIT 10WL (AALA202209233268), EMERGENCY POWER SUPPLY UNIT 11WL (AALA202209233944), EMERGENCY POWER SUPPLY UNIT 12WL (AALA202209230974) AND EMERGENCY POWER SUPPLY UNIT 13WL (AALA202209233057) PER AMM 33-31-38. REPLACED TOGGLE SWITCH 4WL (AALA202209239770) PER AMM 33-51-00 AND ESPM 20-45-21. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.