As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED RT ENGINE FIRE WARNING LIGHT FLICKERING ON DESCENT WITH POWER LEVER REDUCED TO IDLE SPEED. FOUND EXHAUST CASE, CENTER BODY, UPPER RIGHT STRUT SUPPORT FLANGE GASKET BROKEN. REPLACED GASKET WITH NEW GASKET. PERFORMED ENGINE RUN UP AND LEAK-CHECK OF EXHAUST CASE AND ENGINE FIRE WARNING TESTS IAW THE MM AND THE SRM.