Quote:The National Transportation Safety Board (NTSB) issued urgent safety recommendations on Thursday to Boeing and the Federal Aviation Administration (FAA) in response to the potential for a jammed or restricted rudder control system on some 737 Next-Generation and 737 Max 8 aircraft. 
The rudder controls the side to side movement of the nose of the aircraft, otherwise known as the yaw motion. 
BOEING 737 MAX INCIDENT UNDER INVESTIGATION OVER 'STUCK' RUDDER PEDALS
The agency is in the midst of investigating a February incident in which the rudder pedals on a United Airlines Boeing 737 Max 8 were "stuck" in their neutral position during the landing rollout at Newark Liberty International Airport in New Jersey. 
   
United Boeing aircraft parked at gates at Newark Liberty International Airport in Newark, New Jersey on March 19, 2024. (Photographer: Angus Mordant/Bloomberg via Getty Images / Getty Images)
At the time, the captain had to rely on the nosewheel steering tiller to control the airplane’s direction after touching down, the NTSB said.
The pilots reported that the plane was able to taxi to the gate "without further incident" and all 155 passengers and six crew members were able to deplane. No injuries were reported. 

Quote:From Wikipedia, the free encyclopedia United Airlines Flight 585 N999UA (left), the aircraft involved in the accident Accident Date March 3, 1991 Summary Loss of control due to rudder hardover[1] Site Widefield Park, near Colorado Springs Municipal Airport, United States 38°44′09.4″N 104°42′42.4″W Total fatalities 25 Total injuries 1 Aircraft Aircraft type Boeing 737-291 Operator United Airlines IATA flight No. UA585 ICAO flight No. UAL585 Call sign UNITED 585 Registration N999UA Flight origin Greater Peoria Regional Airport Stopover Quad City International Airport Last stopover Stapleton International Airport Destination Colorado Springs Municipal Airport Occupants 25 Passengers 20 Crew 5 Fatalities 25 Survivors 0 Ground casualties Ground injuries 1 United Airlines Flight 585 was a scheduled passenger flight on March 3, 1991, from Denver to Colorado Springs, Colorado, carrying 20 passengers and 5 crew members on board. The plane experienced a rudder hardover while on final approach to runway 35 at Colorado Springs Municipal Airport, causing the plane to roll over and enter an uncontrolled dive. All 25 people on board the Boeing 737 were killed on impact. The National Transportation Safety Board, (NTSB), was initially unable to resolve the cause of the crash, but after similar accidents and incidents involving Boeing 737 aircraft, the crash was determined to be caused by a defect in the design of the 737's rudder power control unit.[1]: ix