Air carrier flight crew reported during landing roll the aircraft pulled hard to the left. Flight crew regained control and taxied to the gate.
Synopsis
Air carrier flight crew reported during landing roll the aircraft pulled hard to the left. Flight crew regained control and taxied to the gate.
Narrative
Flight ABCD ZZZ1 to ZZZ landing on [Runway] XXR normal approach and landing. Stabilized approach with gusty crosswind out of the south. Think the winds were 190 at 14 gust 27 kts. First Officer (FO) was flying it had more than 100 hours in the aircraft to land it with our crosswind limitations with 366 hours in the 175. Landing was good; FO forgot to put in ground crosswind corrections so I reminded him to do that and he did immediately when he landed. I say a few seconds later after rollout the aircraft seemed to start veering to the left. I said to the FO get it back on the centerline and it was at the point I realized that the FO was having trouble keeping it on the centerline. Immediately said coming on the brakes with you and as I took over the aircraft and quickly realized the rudder was almost all the way over to the right and braking both sides and the aircraft was still headed left. Almost felt like we had a flat tire and our inputs were doing nothing. At this point we were headed towards the shoulder of the runway. I made a last effort to disconnect steering on the yoke and that seemed to help correct us from going any further; also at this point we were coming to a stop. We were probably a few feet over the runway side stripes on the shoulder and there are runway lights around that area on the side of the runway. Never got near the grass but left main was on the side part of Runway XXR by a few feet. At that point we were at a stop and the steer off was on the EICAS and only EICAS message which is normal with me disconnecting it. I engaged steering and taxied to the gate. Steering seemed to work fine on the taxi in and airplane had no damage indication on the post flight and working properly. No crew or passengers were hurt and not one passenger said anything about the landing. Called maintenance at the gate and wrote up that veered left right after touchdown and also to check for damage on the left main gear to make sure runway light didn't get hit. Safety manager called and I told him what happened and he let ZZZ tower know to check the lights on XXR.Not really sure; don't know if nose steering or some kind of mechanical issue with the nose wheel steering not working correctly. The airplane could've been trying to wind vane into the south winds with pilot error. One thrust reverser could've just deployed. To cover all bases I made sure to write up the nose wheel steering to be safe that this wouldn't happen to a future flight and be checked by maintenance.Be very vigilant and never let your guard down especially on landing. Always be ready to takeover the aircraft at a moments notice. Always make sure the pilot flying has the correct wind inputs in for landing. Differential reverse thrust to keep the aircraft on the runway if needed.
Second reporter narrative
I was the pilot flying flight ABCD; landing on Runway XXR at ZZZ in a gusting crosswind from left to right. The aircraft touched down just fine on the centerline. The Captain assisted me in keeping crosswind correction applied through the landing rollout. A few seconds after touchdown during rollout; the aircraft started to pull hard to the left. I applied right rudder in an attempt to correct this action; but the aircraft continued to pull to the left. The Captain came on the controls with me and we both applied right rudder until it was fully deflected. The aircraft was nearing the edge of the runway at this point until the captain disconnected the steering; and we were able to regain control of the aircraft; and return it back to the runway centerline. Upon discussion with the captain; we determined there could have been many different causes; but we were uncertain what the real cause was. Those we discussed were the aircraft attempting to weathervane into the wind; potential asymmetrical reverse thrust; or a mechanical fault in the nosewheel steering. Ensure proper crosswind correction all the way until the aircraft has decelerated completely; maintain control with symmetrical braking force and rudder use during rollout. Ensure reverse thrust is deployed correctly.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.