What was found
AIRCRAFT FLYING IN CRUISE AT FLIGHT LEVEL 370, RIGHT ENGINE GAVE A MOMENTARY FIRE WARNING LIGHT. NO OTHER SECONDARY INDICATIONS WERE NOTICED. AIRCRAFT DESCENDED TO DESTINATION KYIP WITH NO OTHER ISSUES. AFTER FURTHER INVESTIGATION, MAINTENANCE FOUND THE TAIL PIPE FIRE DETECT ELEMENT CHAFFING AGAINST TURBINE / EXHAUST CASE SHIELD. REPOSITIONED, REPLACED INSULATORS AT RETENTION CLAMPS. NO OTHER DEFECTS NOTED. SYSTEM TESTED WITH ENGINE RUN AT FULL POWER. FIRE DETECT SYSTEM TESTED SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.