Md-83 captain experiences a high oil temperature indication during descent. Reducing thrust to idle ...

Narrative:

Departing FL220 descending; it was noted left oil temp at 199 degrees. QRH was completed; throttle idle gave an immediate (1-2 seconds) to 109 degrees. Increasing throttle to 1.1 gave an immediate rise in oil temp indication. Fuel temp (7 degrees) and oil quantity were normal for this phase of flight. Fuel heat was not selected or on. Opted to leave engine running at idle; as I felt it more prudent to have the engine in the event we needed increased performance. An emergency was declared due to idle thrust on one engine. Communicated with flight attendants what was going on; but did not advise them to prepare the cabin as I had not turned fuel lever off. I spoke to the passengers on the ground that we were having the emergency equipment take a look at us; as we had an abnormal indication on approach. While southeast approach checklist was completed; throttles were not matched due to above. I advised the first officer I would land the aircraft. An uneventful approach and landing concluded the flight.

Original NASA ASRS Text

Title: MD-83 Captain experiences a high oil temperature indication during descent. Reducing thrust to idle produces an immediate 90 degree temperature reduction and adding thrust returns the temperature to 199 degrees. An emergency is declared and the approach is conducted with the left engine at idle.

Narrative: Departing FL220 descending; it was noted L oil temp at 199 degrees. QRH was completed; throttle idle gave an immediate (1-2 seconds) to 109 degrees. Increasing throttle to 1.1 gave an immediate rise in oil temp indication. Fuel temp (7 degrees) and oil quantity were normal for this phase of flight. Fuel heat was not selected or on. Opted to leave engine running at idle; as I felt it more prudent to have the engine in the event we needed increased performance. An emergency was declared due to idle thrust on one engine. Communicated with flight attendants what was going on; but did not advise them to prepare the cabin as I had not turned fuel lever off. I spoke to the passengers on the ground that we were having the emergency equipment take a look at us; as we had an abnormal indication on approach. While SE approach checklist was completed; throttles were not matched due to above. I advised the First Officer I would land the aircraft. An uneventful approach and landing concluded the flight.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1087703
Time
Date	201305
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Flight Phase	Descent
Component
Aircraft Component	Oil Indicating System
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Md-83 captain experiences a high oil temperature indication during descent. Reducing thrust to idle produces an immediate 90 degree temperature reduction and adding thrust returns the temperature to 199 degrees. An emergency is declared and the approach is conducted with the left engine at idle.