A B1900 in cruise at 15000 ft declared an emergency, shut down #1 engine and diverted due to #1 engine high oil temperature caused by a failed temperature indicator.

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Attributes
ACN	431294
Time
Date	199903
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : msy.airport
State Reference	LA
Altitude	msl single value : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msy.tracon tower : dca.tower
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 119
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : cfi pilot : atp
Experience	flight time last 90 days : 110 flight time total : 3920 flight time type : 400
ASRS Report	431294
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : oil temp indicator
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While leveling at 15000 ft, the oil temperature gauge started to fluctuate and then went to 140 degrees C, which is above BE1900 limit of 105 degrees C in cruise. The emergency/abnormal procedures were reviewed and no procedure was found for high oil temperature. I selcaled our company maintenance and they agreed that shutting down the engine was the best option. I used all company procedures emergency/abnormal, declared the emergency, and returned to the nearest suitable field which was msy. Landed no other problem. Had aircraft towed to gate and passenger deplaned. Callback conversation with reporter revealed the following information: the reporter stated the problem was found to be the #1 engine digital electronic oil temperature indicator which was faulted to the reset mode and continuously was resetting itself. The reporter said when the indicator reset it always reset at a higher value. The reporter said the indicator was recalibrated, the engine oil screens pulled and inspected and found svcable.

Original NASA ASRS Text

Title: A B1900 IN CRUISE AT 15000 FT DECLARED AN EMER, SHUT DOWN #1 ENG AND DIVERTED DUE TO #1 ENG HIGH OIL TEMP CAUSED BY A FAILED TEMP INDICATOR.

Narrative: WHILE LEVELING AT 15000 FT, THE OIL TEMP GAUGE STARTED TO FLUCTUATE AND THEN WENT TO 140 DEGS C, WHICH IS ABOVE BE1900 LIMIT OF 105 DEGS C IN CRUISE. THE EMER/ABNORMAL PROCS WERE REVIEWED AND NO PROC WAS FOUND FOR HIGH OIL TEMP. I SELCALED OUR COMPANY MAINT AND THEY AGREED THAT SHUTTING DOWN THE ENG WAS THE BEST OPTION. I USED ALL COMPANY PROCS EMER/ABNORMAL, DECLARED THE EMER, AND RETURNED TO THE NEAREST SUITABLE FIELD WHICH WAS MSY. LANDED NO OTHER PROB. HAD ACFT TOWED TO GATE AND PAX DEPLANED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE PROB WAS FOUND TO BE THE #1 ENG DIGITAL ELECTRONIC OIL TEMP INDICATOR WHICH WAS FAULTED TO THE RESET MODE AND CONTINUOUSLY WAS RESETTING ITSELF. THE RPTR SAID WHEN THE INDICATOR RESET IT ALWAYS RESET AT A HIGHER VALUE. THE RPTR SAID THE INDICATOR WAS RECALIBRATED, THE ENG OIL SCREENS PULLED AND INSPECTED AND FOUND SVCABLE.

Data retrieved from NASA's ASRS site as of July 2007 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.