As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FORWARD LOWER CABIN EMERGENCY EXIT SIGN ON LEFT HAND SIDE INOP. MAINTENANCE REPLACED EMERGENCY EXIT SIGN AND PERFORMED OPERATIONAL TEST OF EMERGENCY LIGHT SYSTEM IAW DHC-8 200 AMM 33-51-01, PAGES 501-503 WITH NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.