DH8A CREW HAD HIGH OIL TEMP RESULTING IN INFLT ENG SHUTDOWN IN BWI CLASS E AIRSPACE.

Narrative

60 MI N OF BWI; MY FO NOTICED THE #2 ENG OIL TEMP IN THE RED. I NOTICED TEMP AT TOP OF YELLOW AND CONTINUED TO MONITOR TEMP AS IT READ APPROX 100 DEGS THEN CLBED TO 115 DEG. THE FO AND I DISCUSSED THE POSSIBILITY OF SHUTTING THE #2 ENG DOWN. WE DECREASED TORQUE ON THE #2 ENG AND NOTICED A DECREASE IN TEMP TO 100 DEGS. THE TEMP CONTINUED DECREASING TO APPROX 90 DEGS. WE THEN INCREASED TORQUE ON THE #2 ENG TO 80 DEGS. THE TEMP APPEARED TO STABILIZE FOR A COUPLE OF MINS AND THEN ELEVATED RAPIDLY TO 115 DEGS. I THEN DECLARED AN EMER WITH BWI APCH AND WE PROCEEDED TO SHUT #2 DOWN. IT SHOULD BE NOTED OIL PRESSURE AND ALL OTHER ENG INDICATORS WERE WITHIN NORMAL RANGE. I REQUESTED APCH TO NOTIFY COMPANY. I NOTIFIED THE PAX OF THE PRECAUTIONARY SHUTDOWN AND ASSURED THEM OF A NORMAL LNDG. I THEN NOTIFIED OPS OF THE EMER AND GATES WERE CHANGED AT THAT TIME FROM XA TO GATE XB. I REQUESTED TWR HAVE THE EMER VEHICLES STANDING BY AND FO LANDED THE ACFT WITHOUT INCIDENT ON RWY 28. MY DECISION TO SHUT DOWN THE ENG WAS PREDICATED ON THE POSSIBILITY OF THE ENG SEIZING UP DURING THE MOST BUSY TIME OF OUR ARR. I FELT THE PRESSURE GAUGE MAY HAVE NOT BEEN ACCURATE EVEN THOUGH IT READ IN THE GREEN. SUPPLEMENTAL INFO FROM ACN 517711: THE PROB DID TURN OUT TO BE WHAT WE EXPECTED. IT WAS DUE TO A BAD SENSOR IN THE #2 NACELLE. IT SHOULD ALSO BE NOTED THAT THERE IS NO CHKLIST FOR HIGH OIL TEMP. WHEN THE NEEDLE HITS REDLINE; WE ARE TO SHUT IT DOWN.