B757 Undifferentiated or Other Model
Flight Crew Last 90 Days 240; Flight Crew Total 12000; Flight Crew Type 3500
Human-Machine Interface; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented
Human Factors
We landed and proceeded to the gate. After parking; we accomplished the parking flows and the parking checklist. With the checklist complete and the in report sent; I left the airplane and proceeded towards the employee parking lot. The Captain stayed on board the airplane. He phoned me a few minutes after I had left the airplane and related that a ground worker had come on to the airplane while the captain was still on the plane to inform him that the number two engine was still running. He shut the engine down and reran the checklist. I was really shocked to hear this because; in my mind; I saw the Captain shut down both engines. Somehow; when running the checklist; we both missed that the number two engine was still running.
We landed went right to the gate. I set the parking brake and checked the brake pressure. I shut down the left engine and reached forward to check the status of the APU to check and see if it was up and running. I neglected to shut down the right engine and neither my First Officer nor I noticed the oversight. Even during the parking checklist I looked at the fuel controls switches and responded 'Cutoff.' I left the cockpit to greet the folks and left my bags in the cockpit. A person from the ramp informed me about the engine running and I went back to the cockpit to shut it down and ran the parking checklist. My First Officer had already left the aircraft.
B757 flight crew reports forgetting to shut down the right engine after arriving at the gate and not noticing the omission during the parking checklist. A ramp person came up to inform the Captain that the engine was still running.