As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHV - FLT 3912 - FIRST OFFICER REPORTED THE EMERGENCY EXIT SIGN ABOVE FLIGHT ATTENDANT SEAT ILLUMINATES FOR APPROXIMATELY 20 SECONDS AND THEN GOES OUT. THIS IS A REPEAT WRITE UP AND APPEARS TO BE INTERMITTENT. MAINTENANCE REMOVED AND REPLACED THE POWER SUPPLY UNIT 21LN IAW SAAB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)