BE90 first officer reported returning to departure airport after the left engine was shut down in fl...

Attributes
ACN	1312809
Time
Date	201511
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	King Air C90 E90
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 1200 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

On departure the power on our #1 (left) engine stuck at max power. We had not noticed any abnormalities during preflight or our run ups. We continued on our flight plan; notified ATC; and attempted some troubleshooting steps to fix the issue. After about 30 minutes of flying / troubleshooting; we opted to return to ZZZ. We planned the RNAV approach; and shut the engine down while descending to the initial approach fix; rather than try to land with 1 engine at max power. We [advised ATC] as we were now single engine; and proceeded to fly the approach and land without incident.

Original NASA ASRS Text

Title: BE90 First Officer reported returning to departure airport after the left engine was shut down in flight because power could not be reduced below max.

Narrative: On departure the power on our #1 (left) engine stuck at max power. We had not noticed any abnormalities during preflight or our run ups. We continued on our flight plan; notified ATC; and attempted some troubleshooting steps to fix the issue. After about 30 minutes of flying / troubleshooting; we opted to return to ZZZ. We planned the RNAV approach; and shut the engine down while descending to the initial approach fix; rather than try to land with 1 engine at max power. We [advised ATC] as we were now single engine; and proceeded to fly the approach and land without incident.

Data retrieved from NASA's ASRS site 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.

BE90 first officer reported returning to departure airport after the left engine was shut down in flight because power could not be reduced below max.