B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 8507
Confusion; Distraction
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
General None Reported / Taken
Airport; Environment - Non Weather Related
While parked at ORD the passengers were disembarking and I was seated in my seat when suddenly the control wheel violently slammed back into me and simultaneous the aircraft started to slide sideways. I immediately placed the electrical hydraulic systems on and within a second the control wheel moved forward; I was able to apply brake pressure to stop the sideways movement of the aircraft. I called ramp control and asked who was behind me. He stated it was a B777. I informed him what happened. I then got up after everything appeared to be stable and went to the main cabin door to make sure everybody was ok. To my surprise; the aircraft moved about 2 feet. There was a 2-foot gap between the jet bridge and the aircraft. We were lucky no passengers fell through as they were getting off. I then went downstairs to make sure there were no injuries on the ground. I talked to the lead ramp person and he said all okay; by then maintenance was there and inspected the aircraft. He stated all was fine.
B737 Captain reported that while deplaning the aircraft at the gate; there was an abrupt aircraft movement. This movement was attributed to a heavy Boeing 777 taxiing behind his aircraft. No injuries were reported.