What was found
AFTER TAKEOFF, NR 1 ENGINE OIL PRESSURE DROPPED TO BELOW 55 AND FLUCTUATED STEADILY BETWEEN 45-55. ALSO, SAW OIL TEMP START TO RISE. CAPTAIN SHUTDOWN ENGINE AND DECLARED AN EMERGENCY AND RETURNED TO AIRFIELD FOR LANDING. THIS IS A PRELIMINARY REPORT WITH FOLLOW UP TO COME WHEN PROBLEM IS RESOLVED.UPON APPROACH TO EWR DURING TEST FLT, THE AIRCREW NOTICED NR 1 ENGINE OIL TEMPERATURE TOPPED OUT FOR FIVE SECONDS AND IT REPEATED TWO MORE TIMES WITHIN TEN MINUTES. AFTER SHUTDOWN, THE GROUND MAINTENANCE CREW FOUND WIRE 7931-3E20N DAMAGED LEADING TO THE OIL TEMPERATURE SWITCH CANNON PLUG. WIRE WAS REPAIRED, AIRCRAFT WAS TAKEN FOR OPERATIONAL TEST AND SYSTEM CHECKED SATISFACTORY. AIRCRAFT RETURNED TO FLIGHT STATUS.