As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK DUE TO NR 1 ENG OVERHEAT LIGHT CAME ON DURING CLIMBOUT. LIGHT EXTINGUISHED WHEN THRUST LEVER REDUCED TO IDLE. REMOVED NR 1 ENG TO FACILITATE MAINTENANCE PER SAM 104A. REMOVED AND REPLACED FUEL HEAT MANIFOLD PER BOEING MM. REINSTALLED NR 1 ENGINE, OPS CHECK AND LEAK CHECK GOOD PER BOEING MM.