As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS DO NOT WORK IN THE ARM POSITION WITH ALL POWER SHUT DOWN. ALSO, EMERGENCY EXIT LIGHT OVER MAIN CABIN DOOR AND EMERGENCY LIGHT OVER SEAT FOUR DO NOT ILLUMINATE IN THE ON POSITION. ALL OTHER INTERIOR/EXTERIOR EMERGENCY LIGHTS ILLUMINATE IN THE ON POSITION. CORRECTIVE ACTION: REPLACED BATTERY SUPPLY ASSY FUSE. OPS CHECK GOOD. IAW CESSNA CE-680 AMM 33-50-10