Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Distraction; Situational Awareness; Troubleshooting
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Environment - Non Weather Related; Human Factors
The Captain asked me to secure the number two engine for a single engine taxi into the gate at ZZZ. I wrapped my fingers around the no 2 engine cut off lever and brought the lever to cutoff. I guess with my pinkie finger I accidentally also pulled the no 1 engine start lever out of the indent. I proceeded to secure the overhead panel after I did this I glanced back down at the start levers and first saw the no 1 engine start lever off the indent and in a panic I thought the Captain wanted me to shut off the no 1 engine and I thought I had started the procedure but didn't complete the task fully. So I started to bring the no 1 engine start lever to cutoff; realized the error of my ways and put it back up into the indent. The number one engine then shut down also. We then stopped the plane and started the number one engine back up and taxied to the gate without further incident.It is something I have never done before; I needed to be more careful with my finger placement on the levers. I needed to slowdown. I was coming off of a two month leave and was just trying to show the Captain I was not rusty with any of the procedures. Single engine taxi is a somewhat unusual procedure for me and I should have slowed down and thought about each task before I accomplished the task.
First Officer reported being instructed to secure the number two engine for a single engine taxi to the gate; but accidentally shut off both engines.