PIC light transport twin engine shuts down one engine on final approach due to low oil pressure indication from two sources.

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Attributes
ACN	137670
Time
Date	199002
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	msl bound lower : 830 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : msp
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other descent : approach
Route In Use	approach : straight in approach : visual arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 120 flight time total : 3030
ASRS Report	137670
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 300 flight time total : 6500
ASRS Report	137777
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other Other
Supplementary
Primary Problem	Aircraft

Narrative:

I was operating as a first officer on a turboprop commuter aircraft. We were at approximately 4000' MSL on a visual approach to runway 11L at msp. We noticed an intermittent low oil pressure indication light on the right engine followed by low oil pressure indication on the gauge. The captain and I briefly discussed the situation and elected to do a precautionary engine shutdown once we had a continuous low oil pressure indication. Our company manual has specific procedures for this situation and the engine was shut down per our policy and standard procedures. It was my leg to fly so I continued approach to 11L while the captain declared an emergency, called for emergency equipment, briefed the 7 passenger and notified our operations department. The landing was uneventful and we taxied safely to our ramp area. The passenger were deplaned and maintenance was notified. After briefly looking over the engine they found a broken oil line from the negative torque sensing system. The engine still had some oil and appeared to be undamaged. The appropriate authorities were notified.

Original NASA ASRS Text

Title: PIC LTT TWIN ENGINE SHUTS DOWN ONE ENGINE ON FINAL APCH DUE TO LOW OIL PRESSURE INDICATION FROM TWO SOURCES.

Narrative: I WAS OPERATING AS A F/O ON A TURBOPROP COMMUTER ACFT. WE WERE AT APPROX 4000' MSL ON A VISUAL APCH TO RWY 11L AT MSP. WE NOTICED AN INTERMITTENT LOW OIL PRESSURE INDICATION LIGHT ON THE RIGHT ENGINE FOLLOWED BY LOW OIL PRESSURE INDICATION ON THE GAUGE. THE CAPT AND I BRIEFLY DISCUSSED THE SITUATION AND ELECTED TO DO A PRECAUTIONARY ENGINE SHUTDOWN ONCE WE HAD A CONTINUOUS LOW OIL PRESSURE INDICATION. OUR COMPANY MANUAL HAS SPECIFIC PROCS FOR THIS SITUATION AND THE ENGINE WAS SHUT DOWN PER OUR POLICY AND STANDARD PROCS. IT WAS MY LEG TO FLY SO I CONTINUED APCH TO 11L WHILE THE CAPT DECLARED AN EMER, CALLED FOR EMER EQUIPMENT, BRIEFED THE 7 PAX AND NOTIFIED OUR OPERATIONS DEPT. THE LNDG WAS UNEVENTFUL AND WE TAXIED SAFELY TO OUR RAMP AREA. THE PAX WERE DEPLANED AND MAINT WAS NOTIFIED. AFTER BRIEFLY LOOKING OVER THE ENGINE THEY FOUND A BROKEN OIL LINE FROM THE NEGATIVE TORQUE SENSING SYSTEM. THE ENGINE STILL HAD SOME OIL AND APPEARED TO BE UNDAMAGED. THE APPROPRIATE AUTHORITIES WERE NOTIFIED.

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.