As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF, THE NR 2 EPR WAS .2 BELOW NR 1 WITH OTHER PARAMETERS MATCHED. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. THE EPR TRANSMITTER WAS REPLACED. A BROKEN PT7 TUBE WAS FOUND BETWEEN THE 2 O'CLOCK AND 4 O'CLOCK PROBES. REPLACED THE PT7 TUBE. ENGINE RUN-UP CHECKED OK. AIRCRAFT RETURNED TO SERVICE.