As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN CLOSING EMERGENCY LIGHT TOGGLE SWITCH TO ARM EMERGENCY LIGHTS TO GET SWITCH COVER CAUSES THE EMERGENCY LIGHTS SWITCH TO GO OFF. NOT THE ARMED POSITION. ALSO CAUSING EMERGENCY LIGHTS EICAS MESSAGE TO APPEAR, WE LEFT TOGGLE SWITCH COVER OPEN. SWITCH GUARD ACTIVATION CLIP WAS NOT ENGAGED TO SWITCH RE-ENGAGED CLIP AND SWITCH OPERATES NORMAL. ACFT OK FOR SERVICE.