As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS BATTERY: EMERGENCY LIGHTS DO NOT ILLUMINATE WHEN SELECTED TO ON. ACCOMPLISHED A POWER CYCLE TO INCLUDE DISCONNETING THE MAIN BATTERIES, WHICH HAD NO EFFECT. // SIGNOFF// T/S TO FAILED BATTERY PACK. REMOVED FAILED ASSY AND INSTALLED A REPAIRED ASSY IAW CE-700 AMM 33-50-07 ALL OPS CHECKS GOOD