As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PSC FLIGHT NR 2121, LEFT INBOARD DEICE LIGHT CONTINUOUSLY ILLUMINATED ON WING EVEN LIT ON GROUND AFTER TERMINATING CHECK LIST COMPLETE. MAINTENANCE PERFORMED FUNCTIONAL TEST OF AIRFRAME DEICING SYSTEM. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.