As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSING 30K FEET CLIMBING TO FL 340, A NR 1 ENGINE FIRE INDICATION, ENGINE INDICATIONS WERE NORMAL. FOLLOWED ECAMS AND SECURED THE NR 1 ENGINE. FIRE INDICATION REMAINED AFTER AGENT FIRED. FIRED THE NR 2 AGENT AND THE FIRE INDICATION DEACTIVED. RETURNED TO DEPARTURE. REPLACED THE RELAY 9WD IAW ESPM 20-46-50. PERFORMED A NR 1 FIRE DETECTION TEST IAW 26-12-00-05-02. NO DEFECTS NOTED.