As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT ENGINE OIL TEMPERATURE GAUGE READING HIGH END OF YELLOW ARC ALL OTHER INDICATIONS NORMAL. AIR TURNBACK TO DTW. MAINTENANCE REMOVED AND REPLACED RT OIL TEMP DETECTOR IAW GE MM CHAP 79. PERFORMED GROUND RUNS AT VARIOUS POWER SETTINGS. ALL INDICATIONS GOOD. P/N 4053T73PO1, S/N ON EGNAB470. LEAK CHECK GOOD.