As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS TEST FAILED DURING PREFLIGHT. TWO UNSUCCESSFUL SEPARATE 30' CHARGING CYCLES (60' CUMULATIVE) WERE PERFORMED PER QRH CHARGING PROCEDURE. NO LIGHTS ILUMINATE WITH SWITCH IN ARM POSITION. CORRECTIVE ACTION: REPLACED BATTERIES IAW CE-680A MM CHAP 33-50-06 OPS CHECK GOOD.