B737-300
Flight Crew Last 90 Days 395; Flight Crew Type 4000
Human-Machine Interface
Aircraft Equipment Problem Critical; Ground Excursion Runway; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew Regained Aircraft Control
Aircraft
After landing; the Captain struggled to keep the aircraft on the runway. The aircraft pulled hard to the left [and] departed the left side of the runway. The Captain was able to turn back on the runway and exit the next taxiway. We had airport Operations look over the airplane. He said the aircraft looked fine and the tires were OK. We elected to taxi back to the gate. There were no injuries involved.There was something wrong with the aircraft to force it to swerve hard left.
For reasons not provided by the reporter the flight crew of a B737-300 was unable to prevent the aircraft from briefly exiting the runway on the landing roll before regaining control and returning to the hard surface. When an inspection by airport personnel identified no obvious problems the crew elected to taxi the aircraft to the gate.