Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Distraction
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
General None Reported / Taken
Human Factors; Procedure
I was made aware that an engine was not properly secured after a flight with flight crew not in the immediate area. In trying to recall the events of that flight; I cannot recall specially if we shut the engine down or not and if an appropriate checklist was completed or not. I [did] know that this was the last leg of a four day and I was hoping to catch a flight home; and was feeling rushed to complete tasks so that I could duty out. It is likely that in my haste to pack things up and get out of the cockpit as quickly as possible; that we missed shutting down one of the engines and forgot to complete a checklist. I remember saying my goodbyes to the captain still sitting in his seat as I left the aircraft; whom I presumed would run the power down checklist. Also in my haste I forgot to do a post flight walk around. During the course of the trip; the captain had done a handful of post flights for me after taking a smoke break outside. This break from my usual flow; and added to my haste to catch a flight caused me to forget to do a post walk around that would have surely caught an unsecured engine.The main undesired state in this event was having an engine running without flight crew present. This was caused by being hurried and rushed to try and get the aircraft secured and shutdown as quickly as possible which resulted in errors of not properly completing checklists.Specifically for commuting pilots; or pilots trying to get home fast; there is a sense of get there as quickly as possible. These moments should be recognized for their propensity to cause mistakes. Normal items that you do daily with regularity can be overlooked. In the future I will tell myself in these situations that nothing is more important that the safety of those on board and on the ground; and to just slow down and make sure everything is completed per the checklist and our OM.
CRJ-200 First Officer reported they failed to complete power down checklist resulting in the engine operating with no flight crew onboard.