As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO BOS FROM MDT, THE NR 1 ENGINE OIL TEMP WENT OFF SCALE. THE AIRCRAFT RETURNED TO MDT AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT AND FOUND THE TEMP INDICATION AT FAULT. THE OIL TEMP INDICATOR AND BULB WERE REMOVED AND REPLACED. SYSTEM OPERATIONALLY CHECKED GOOD. A/C RETURNED TO SERVICE. (M)