As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM TOL TO SLC, THE AIRCRAFT HAD THE FIRE WARNING BELL COME ON WITH ANY WARNING LIGHT INDICATION AS TO WHICH ENGINE OR ANY OTHER INDICATIONS. THE AIRCRAFT LANDED WITHOUT DIFFICULTIES. FOUND GLARESHIELD SWITCH STUCK. CLEANED FIRE TEST SWITCH. OPERATIONAL CHECK FOUND NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)