What was found
(CAN) CUSTOMER REPORTED THAT DURING THE MISSED APPROACH, THE NR 2 ENGINE DID NOT GENERATE FULL POWER DURING THE GO-AROUND MANEUVER. THE PILOTS NOTED LARGE FLAMES COMING-OUT FROM THE EXHAUST AND A SPIKE IN THE ITT OF THENR 2 ENGINE. THE FLIGHT CREW SECURED THE NR 2 ENGINE AND DECLARED AN EMERGENCY. A SHORT TIME LATER THE ACFT LANDED SAFELY. DURING TROUBLESHOOTING, MAINTENANCE MECHANICS WERE ABLE TO REPRODUCED FEW TIMES THE INCIDENT, EVEN AFTER THE FCU AND PUMP WERE CHANGED. TROUBLESHOOTING STILL ONGOING.