As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERG LIGHT: PREFLIGHT CHECK OF THE EMER LTS REVEALED AN INCONSITENCY WITH SWITCH PLACEMENT. FOLLOWING A 2.5 HOUR FLIGHT AND CREW SWAP, THE LIGHTS ILLUMINATE NORMALLY IN ARM WITH BATT SWITCHES OFF AND SUBSEQUENTLY IN THE ON POSITION. HOWEVER, WHEN PLACED INTO ON FROM THE OFF POSITION, THE CABIN EMERGENCY LIGHTS FAILED TO ILLUMINATE. CORRECTIVE ACTION; REPLACED EMERGENCY BATTERY IAW CE-700 AMM 33-50-05. OPS CHECK GOOD.