What was found
EMERGENCY LIGHTING: ON PREFLIGHT, FOUND 3 EMERGENCY LIGHTS INOPERATIVE. FLOOR LIGHT BELOW SEAT 3, ABOVE EYEBALL LIGHT AT SEAT 3 AND RIGHT EXTERIOR WING INSPECTION LIGHT. // SIGNOFF// ARRIVED AT AC. CONFIRMED DISCREPANCY. TROUBLESHOT ISSUE TO FAULTY #2 BATTERY PACK. AFTER EXPERIENCING AIR CARRIER DELAY, RETRIEVED PART FROM FBO. ACCOMPLISHED INCOMING PART CHECK, PART CHECK GOOD. ARRIVED AT AC. PREPPED AC FOR REPLACEMENT OF #2 EMERGENCY BATTERY PACK. REMOVED #2 BATTERY CHARGER SYSTEM P/N CBS28-1 S/N 2824M DUE TO INTERNAL FAILURE. INSTALLED REPAIRED BATTERY CHARGER SYSTEM P/N CBS28-1 S/N 4174M AS REQUIRED. PERFORMED AND FOUND OPERATIONAL CHECK SATISFACTORY. DISCREPANCY NO LONGER STANDS. WORK DONE IRW CE-680A AMM 33-50-06. 01AUG2022