As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, NR 1 ENGINE OVHT LIGHT FLICKERED ON AND OFF DURING CLIMBOUT. IT PROGRESSED TO STEADY ON. EXTINGUISHED WHEN NR 1 ENG THROTTLE RETARDED TO IDLE THRUST. ALL OTHER ENGINE INDICATIONS WERE NORMAL. REMOVED AND REPLACED PRECOOLER ON NR 1 ENG PER BOEING MM.