What was found
AIRCRAFT GROUNDED. ON CLIMBOUT, RECEIVED AN ENG2 LOOP CAUTION FOR A FEW SECONDS. AFTER A FEW MINUTES WE RECEIVED AN ENG2 FIRE WARNING LASTING ABOUT 6 SECONDS.AFTER A FEW MINUTES WE RECEIVED IT AGAIN AND DID NOT EXTINGUISHED. COMPLIED WITH ECAM ACTIONS. UPON INSPECTION FOUND PRIMARY FUEL MANIFOLD B NUT TO BE IMPROPERLY SEATED. RETORQUED PRIMARY FUEL MANIFOLD B NUT ON FUEL NOZZLE #2 REF AMM 73-11-30-400-802-A. POWER ASSURANCE AND IDLE LEAK CHECK GOOD. A/C OK TO CONTINUE T/W - DNH51150 DUE 10/14/2025. THIS AIRCRAFT WAS RETURNED TO SERVICE AT THIS TIME.