Air carrier light transport return land after aircraft equipment problem on takeoff.

Attributes
ACN	187591
Time
Date	199108
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cvg
State Reference	OH
Altitude	agl bound lower : 300 agl bound upper : 2500
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg tower : cvg
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : initial cruise other descent : approach
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 : 250 flight time total : 2500 flight time type : 1000
ASRS Report	187591
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical non adherence other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

We noticed a substantial roll back on the left engine right after gear retraction, and decided to turn back to the airport. After burning off fuel, we were above landing weight on takeoff, we got vectors for the ILS 18L approach in cvg. We noticed that the torque on the left engine would not go below 33 percent which is well above the 15-17 percent for landing and decided about 1 mi out to shut it down. I was the PF and busy with the aircraft. The captain went on the radio and told tower that we shut 1 engine down but did not declare an emergency, which he should have done, but due to the heavy workload in the cockpit, forgot to. The fire trucks were out and we taxied in without any further problems.

Original NASA ASRS Text

Title: ACR LTT RETURN LAND AFTER ACFT EQUIP PROBLEM ON TKOF.

Narrative: WE NOTICED A SUBSTANTIAL ROLL BACK ON THE L ENG RIGHT AFTER GEAR RETRACTION, AND DECIDED TO TURN BACK TO THE ARPT. AFTER BURNING OFF FUEL, WE WERE ABOVE LNDG WT ON TKOF, WE GOT VECTORS FOR THE ILS 18L APCH IN CVG. WE NOTICED THAT THE TORQUE ON THE L ENG WOULD NOT GO BELOW 33 PERCENT WHICH IS WELL ABOVE THE 15-17 PERCENT FOR LNDG AND DECIDED ABOUT 1 MI OUT TO SHUT IT DOWN. I WAS THE PF AND BUSY WITH THE ACFT. THE CAPT WENT ON THE RADIO AND TOLD TWR THAT WE SHUT 1 ENG DOWN BUT DID NOT DECLARE AN EMER, WHICH HE SHOULD HAVE DONE, BUT DUE TO THE HVY WORKLOAD IN THE COCKPIT, FORGOT TO. THE FIRE TRUCKS WERE OUT AND WE TAXIED IN WITHOUT ANY FURTHER PROBLEMS.

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.