What was found
CLIMBING OUT OF DTW, NR 2 ENGINE OIL QUANTITY INDICATION BEGAN DECREASING RAPIDLY. NOTING A RISE IN OIL TEMPERATURE, THE CREW DECIDED TO PERFORM A PRECAUTIONARY SHUTDOWN OF THE ENGINE. THE FLIGHT RETURNED TO DTW FOR AN UNEVENTFUL LANDING. THE OIL TEMPERATURE SYSTEM OPERATION CHECKED NORMAL. THE OIL QUANTITY INDICATION SYSTEM HAD MALFUNCTIONED, IT WAS PLACED ON MEL AND THE AIRCRAFT CONTINUED IN SERVICE. SUBSEQUENT REPLACEMENT OF THE OIL QUANTITY TRANSMITTER RESTORED NORMAL SYSTEM OPERATION.