As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2002. EMERGENCY LIGHT IN COCKPIT WILL NOT TURN ON. REMOVED FROM SERVICE. INTERROGATED CMC FOUND EMER BATT FAULT ADVISORY WITH NO CORRELATED MTX MSG. PERFORMED EMERGENCY-LIGHT POWER UNIT CHARGING IAW E175 AMM 33-50-01-800-801-A OPS TEST OF EMERGENCY LIGHTING GOOD. ALL LIGHTS OPERATE AS REQUIRED. A/C OK FOR SERVICE. NO PARTS REPLACED.