What was found
UPON POST FLIGHT WE NOTICED AS WE TURNED THE BATTERIES OFF AND THE EMER LIGHTS STILL ARMED THE EMER LIGHTS UNDER SEAT 5 AND 8 DID NOT STAY LIGHT. CORRECTIVE ACTION: PICKED UP PART FROM FBO. SET UP TOOLING. REMOVED FAILED BATTERY PACK #3 PN 6430028-1 SN E25-13024 AND INSTALLED A NEW CUSTOMER SUPPLIED BATTERY PACK PN 6430028-1 SN F25-11391. VISUAL AND OPERATIONAL TESTS SATISFACTORY. SECURED CARPET, PAX SEAT SKIRT PANEL AND RH PSU. VISUAL INSPECTION SATISFACTORY. ALL WORK IAW CE680A MM:33-50-06. CLEANED WORK AREA AND TOOLING.