As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK. NR 1 ENGINE EGT STARTED TO EXCEED 900'C ON TAKEOFF ROLL. PULLED THRUST LEVER BACK DURING CLIMB TO PREVENT EXCEEDING MAX CONTINUOUS EGT. ALSO, NR 1 ENGINE VIBE INDICATOR WAS SHOWING 4 AND 5 DURING CLIMB. PERFORMED BORESCOPE OF LPT STAGE 1 NOZZLE GUIDE VANES. FOUND 2 EACH NOZZLES OUT OF LIMITS. REMOVED AND REPLACED NR1 ENGINE. PERFORMED FUNCTIONAL CHECK FLIGHT. FOUND SATISFACTORY.