What was found
CABIN EMERG LIGHT: WITH MAIN SHIPS BATTERIES PLUGGED IN AND MAIN BATTERY SWITCHES OFF. WITH THE EMERGENCY LIGHT SWITCH IN THE ARM POSITION, LIGHTS ABOVE SEATS #3 AND #5 ARE INOPERATIVE. AISLE LIGHTS UNDER SEATS #3, #5, AND SEAT #8 ARE ALSO INOPERATIVE.COMPLIED WITH TASK CARD TC-FLT-33·1001 EMERGENCY LIGHTING POWER SUPPLY BATTERY EXERCISE PROCEDURE. REV. 1 DATE1 04MAY2022. FOUND BATTERY PACKS #1, 2 AND 4 AIR.WORTHY, BATTERY PACK #3 FAILED. REMOVED #3 BATTERY PACK P/N CBS28-1 S N: 4411M AND INSTALLED NEW BATTERY PACKP NI CBS28-1 S NI 008697 IAW CESSNA 680A MM CH. 33-50-06.