Embraer flight crew reported leaving the airplane with one engine still running.

Attributes
ACN	1544915
Time
Date	201805
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	Embraer Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Parked
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 9985
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Other / Unknown

Narrative:

Number two engine was left at idle at the gate. On arrival; we pulled up to the gate and performed our parking checklist. The aircraft had a quick turn and the oncoming captain was at the bottom of the jetway. APU and both packs were on as we did a debrief of the aircraft and flight with the oncoming captain. Minutes later; while on the van to the hotel; we were notified by the oncoming captain that the number 2 engine was at idle and that he had shut it down. As I recall; all appropriate switches were off and/or stop per the parking checklist. After reading the expanded checklist; I will include a scan of the engine indicators upon shutdown.

Original NASA ASRS Text

Title: Embraer flight crew reported leaving the airplane with one engine still running.

Narrative: Number two engine was left at idle at the gate. On arrival; we pulled up to the gate and performed our parking checklist. The aircraft had a quick turn and the oncoming Captain was at the bottom of the jetway. APU and both packs were on as we did a debrief of the aircraft and flight with the oncoming Captain. Minutes later; while on the van to the hotel; we were notified by the oncoming Captain that the number 2 engine was at idle and that he had shut it down. As I recall; all appropriate switches were off and/or stop per the parking checklist. After reading the expanded checklist; I will include a scan of the engine indicators upon shutdown.

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.