As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BEGINNING TAXI, F/A CALLED AND SAID THAT THE EMERGENCY LIGHTS OVER BOTH F/A CONTROL PANELS WOULD NOT GO OUT. REMOVED AND REPLACED PUSH BUTTON SWITCH FIN NR 9LE AS PER ATR MM WIRING SCHEMATIC NR 33-12-02. PERFORMED OPT CK IAW JIC NR 33-20-00 AND FOUND OK.