As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERG EXIT SIGN/LIGHT: WITH THE AIRCRAFT BATTERY SWITCH ON AND EMER SWITCH ON, ALL EMER LIGHTS WORK NORMAL. WHEN TURNING THE AIRCRAFT BATTERY SWITCH OFF, THE EXTERIOR EMER LIGHTS OVER THE WING AND THE EXIT SIGNS IN THE AFT PART OF THE CABIN DO NOT WORK. CORRECTIVE ACTION: REPLACED BATTERY. OPS CHECK GOOD. IAW CESSNA MODEL 560XL AMM 33-50-01