As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF AND CLIMB, THE NR 1 ENGINE EPR AND N1 DROPPED AND THE FIRE LIGHT ILLUMINATED. SHUT DOWN NR 1 ENGINE AND RETURNED TO DTW. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. REPLACED THE 15TH STAGE COUPLING, HIGH STAGE VALVE, TWO DUCTS FORWARD OF HIGH PRESSURE VALVE, AND CLAMPS CONNECTING HIGH STAGE VALVE. OPERATIONAL CHECK GOOD.