Narrative:

Our aircraft took off from the airport. We carried 18 passenger but were about 1000 pounds lighter than the maximum gross weight. It was my leg. The captain was the PNF. After about 35 min flight; I noticed the left torque gauge drop to 20 pounds suddenly and to 0 pounds and felt a little yaw movement to left. The captain noticed T5 gauge up to red arc. I heard left engine turbine noise went silent. We did 'engine failure in-flight' procedures. We idented left engine failed and shut down the left engine. I headed to airport directly through the 'sfra flying free zone.' the captain contacted the tower; told them we had an engine failure. 10 mi north of airport; the tower cleared us to straight-in runway 21. I could maintain altitude at 9500 ft with 10 degrees flaps. We had enough time to do 'in range checklist' and 'before landing checklist.' the captain asked if I wanted him to fly; and I replied I would fly. So he supported me through the flight. On the approach; the captain reminded me we had enough runway to land. I maintained a little higher altitude than normal through the final approach. The wind was light crosswind from west. I landed with single engine uneventfully with the captain's support. After landing; the captain taxied with 1 engine failed. We did the right procedures and landed safely. Nobody was hurt. I believe nothing was wrong with our procedures dealing with 1 engine failure.

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Original NASA ASRS Text

Title: DHC6 EXPERIENCE INFLT LOSS OF L ENG. SAFELY RETURN TO DEP ARPT.

Narrative: OUR ACFT TOOK OFF FROM THE ARPT. WE CARRIED 18 PAX BUT WERE ABOUT 1000 LBS LIGHTER THAN THE MAX GROSS WT. IT WAS MY LEG. THE CAPT WAS THE PNF. AFTER ABOUT 35 MIN FLT; I NOTICED THE L TORQUE GAUGE DROP TO 20 LBS SUDDENLY AND TO 0 LBS AND FELT A LITTLE YAW MOVEMENT TO L. THE CAPT NOTICED T5 GAUGE UP TO RED ARC. I HEARD L ENG TURBINE NOISE WENT SILENT. WE DID 'ENG FAILURE INFLT' PROCS. WE IDENTED L ENG FAILED AND SHUT DOWN THE L ENG. I HEADED TO ARPT DIRECTLY THROUGH THE 'SFRA FLYING FREE ZONE.' THE CAPT CONTACTED THE TWR; TOLD THEM WE HAD AN ENG FAILURE. 10 MI N OF ARPT; THE TWR CLRED US TO STRAIGHT-IN RWY 21. I COULD MAINTAIN ALT AT 9500 FT WITH 10 DEGS FLAPS. WE HAD ENOUGH TIME TO DO 'IN RANGE CHKLIST' AND 'BEFORE LNDG CHKLIST.' THE CAPT ASKED IF I WANTED HIM TO FLY; AND I REPLIED I WOULD FLY. SO HE SUPPORTED ME THROUGH THE FLT. ON THE APCH; THE CAPT REMINDED ME WE HAD ENOUGH RWY TO LAND. I MAINTAINED A LITTLE HIGHER ALT THAN NORMAL THROUGH THE FINAL APCH. THE WIND WAS LIGHT XWIND FROM W. I LANDED WITH SINGLE ENG UNEVENTFULLY WITH THE CAPT'S SUPPORT. AFTER LNDG; THE CAPT TAXIED WITH 1 ENG FAILED. WE DID THE RIGHT PROCS AND LANDED SAFELY. NOBODY WAS HURT. I BELIEVE NOTHING WAS WRONG WITH OUR PROCS DEALING WITH 1 ENG FAILURE.

Data retrieved from NASA's ASRS site as of January 2009 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.