As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 3521 - THE CREW REPORTED THAT THE EMERGENCY LIGHTS ILLUMINATED IN THE CABIN AND THE EMERGENCY EXIT ANNUNCIATOR FAILED TO ILLUMINATE WHEN PUSHED. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED SWITCH 2WL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)