What was found
CLT - FLT 560 - EN ROUTE FROM PIT-CLT, CREW REPORTED THE FIRE LIGHTS/BELL CUTOUT LIGHTS ON BOTH SIDES OF THE GLARESHIELD ILLUMINATED TWICE DURING FLIGHT. NO OTHER BELLS, FIRE HANDLE LIGHTS OR MASTER CAUTION LIGHTS WERE REPORTED TO HAVE SOUNDED/ILLUMINATED. FLIGHT CONTINUED AND LANDED WITHOUT FURTHER INCIDENT AT CLT. MAINTENANCE REMOVED AND REPLACED THE ENGINE AND APU FIRE DETECTION M279 MODULE. OPERATIONAL CHECK NORMAL. (M)