Narrative:

At FL160 in cruise all was fine. We were in cruise indicating 70 percent torque and 100 percent RPM with normal egt and fuel flows. Picking up a trace of rime. Then we heard a sudden change in engine sound and witnessed an increase in torque on the right engine to 100 percent, a drop in egt, and a drop in fuel flow. We completed the emergency checklist for erratic torque indications. When the srl and ttl's were turned off, the engine surged to 120 percent torque. We turned the srl's and ttl's back on, used continuous ignition, and had engine ice on. The checklist called for engine shutdown. The engine appeared to be running fine with just some abnormal indications. We called maintenance and they told us to press on and call on ground in alo. During my descent, I pulled the power levers to flight idle. At flight idle, right engine was producing 60 percent torque. With alo reporting VFR, we were over the airport and opted to shut down the right engine. We completed the in-flight engine shutdown checklist. I asked for the crash fire rescue equipment, and then relinquished control of the aircraft to the captain for approach and landing. The captain made a normal landing with one engine out using only flaps 20 degrees and 4 KTS added to vref. Unloaded at gate as usual.

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Original NASA ASRS Text

Title: FLC OF AN LTT MADE A PRECAUTIONARY SHUTDOWN OF ONE ENG WHEN THERE WAS A DROP IN EGT AND FUEL FLOW, WITH AN ERRATIC TORQUE INDICATION, DURING CRUISE.

Narrative: AT FL160 IN CRUISE ALL WAS FINE. WE WERE IN CRUISE INDICATING 70 PERCENT TORQUE AND 100 PERCENT RPM WITH NORMAL EGT AND FUEL FLOWS. PICKING UP A TRACE OF RIME. THEN WE HEARD A SUDDEN CHANGE IN ENG SOUND AND WITNESSED AN INCREASE IN TORQUE ON THE R ENG TO 100 PERCENT, A DROP IN EGT, AND A DROP IN FUEL FLOW. WE COMPLETED THE EMER CHKLIST FOR ERRATIC TORQUE INDICATIONS. WHEN THE SRL AND TTL'S WERE TURNED OFF, THE ENG SURGED TO 120 PERCENT TORQUE. WE TURNED THE SRL'S AND TTL'S BACK ON, USED CONTINUOUS IGNITION, AND HAD ENG ICE ON. THE CHKLIST CALLED FOR ENG SHUTDOWN. THE ENG APPEARED TO BE RUNNING FINE WITH JUST SOME ABNORMAL INDICATIONS. WE CALLED MAINT AND THEY TOLD US TO PRESS ON AND CALL ON GND IN ALO. DURING MY DSCNT, I PULLED THE PWR LEVERS TO FLT IDLE. AT FLT IDLE, R ENG WAS PRODUCING 60 PERCENT TORQUE. WITH ALO RPTING VFR, WE WERE OVER THE ARPT AND OPTED TO SHUT DOWN THE R ENG. WE COMPLETED THE INFLT ENG SHUTDOWN CHKLIST. I ASKED FOR THE CRASH FIRE RESCUE EQUIP, AND THEN RELINQUISHED CTL OF THE ACFT TO THE CAPT FOR APCH AND LNDG. THE CAPT MADE A NORMAL LNDG WITH ONE ENG OUT USING ONLY FLAPS 20 DEGS AND 4 KTS ADDED TO VREF. UNLOADED AT GATE AS USUAL.

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.