B777-200
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
General Maintenance Action
Aircraft; Human Factors
After chocking the nose gear; the jet way began moving forward. I then noticed engine number 1 still running; beacon lights off; and jet way started to move forward. Then I stopped jet way and I made sure that my wing walkers were still in position outside stopping traffic due to the fact that engine number 1 still running. At which I called control center to notify them that the engine number 1 was still running. Maintenance witnessed that the engine was still running while the beacon lights are off. They later did an engine run and discovered that the engine had issues.
Ramp agent reported the aircraft engine remained running after arrival at the gate; possibly associated with an engine problem.