B737 flight crew reported neglecting to shutdown the left engine after parking the aircraft at the g...

Attributes
ACN	1590320
Time
Date	201810
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Type 1193
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Type 822
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

After arriving early; we stopped short of the j-line and waited several minutes for our ground crew to position and marshal us to the gate after an uneventful flight and landing. We parked the aircraft at [the] gate and accomplished the parking flow and checklist. I then opened the flight deck door and proceeded to say goodbye to the deplaning passengers. I immediately noticed excessive noise from outside the forward entry door. It was then I looked back into the cockpit and realized we failed to shut down the left engine. I immediately shut it down and the noise ceased. Apparently; we accomplished the parking checklist without visually verifying the left start lever was in the cutoff position.

Original NASA ASRS Text

Title: B737 flight crew reported neglecting to shutdown the left engine after parking the aircraft at the gate.

Narrative: After arriving early; we stopped short of the J-line and waited several minutes for our ground crew to position and marshal us to the gate after an uneventful flight and landing. We parked the aircraft at [the] gate and accomplished the parking flow and checklist. I then opened the flight deck door and proceeded to say goodbye to the deplaning passengers. I immediately noticed excessive noise from outside the forward entry door. It was then I looked back into the cockpit and realized we failed to shut down the left engine. I immediately shut it down and the noise ceased. Apparently; we accomplished the parking checklist without visually verifying the left start lever was in the cutoff position.

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.