Narrative:

I was the sic and pilot monitoring on this flight when we experienced a nose wheel steering failure during landing rollout resulting in an uncommanded turn on the runway delaying our exit from the active runway. The aircraft did not depart the runway surface and the captain was able to stop the aircraft without incident and re-engage the nose wheel steering and taxi off the runway to the ramp without assistance. The flight was conducted normally with no abnormalities throughout the departure; climb; cruise; descent and approach phases. The actual landing was also completed without any problems.the captain was bringing the aircraft to taxi speed using brakes and thrust reverse after touchdown; using moderate braking effort. At a speed [of] approximately 20-30 knots; the captain was preparing to initiate a turn to the left off [the] runway onto the taxiway when an uncommanded turn to the right began. The turn increased in severity and by the time the captain was able to bring the aircraft to a complete stop; the aircraft was approximately 90 degrees to the right of runway heading. As the turn progressed and it became clear that we would not be able to immediately exit the active runway; I made a radio call to tower that we had an issue on the runway and would not make the taxiway. After we had come to a stop and the captain was able to re-engage the nose wheel steering; we taxied off the runway onto the taxiway and notified tower that we would be able to exit the runway under our own power. Tower asked if we needed assistance and if we had any requests. We declined assistance and stated our request to taxi to the ramp. Tower transferred us to ground control where; after confirming that we did not need assistance; were cleared to taxi to the ramp. We informed ground control that the reason for the delay on the runway was due to a nose wheel steering fault; and they acknowledged.I cannot think of anything that could have been done to improve the situation. It happened quickly and the resolution likewise was done quickly. We spent minimum extra time on the runway given the circumstance. The nose wheel steering functioned properly after being re-engaged for the taxi to the ramp.

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Original NASA ASRS Text

Title: Learjet 70 flight crew reported their nose wheel steering failed when they tried to clear the runway after landing.

Narrative: I was the SIC and Pilot Monitoring on this flight when we experienced a nose wheel steering failure during landing rollout resulting in an uncommanded turn on the runway delaying our exit from the active runway. The aircraft did not depart the runway surface and the Captain was able to stop the aircraft without incident and re-engage the nose wheel steering and taxi off the runway to the ramp without assistance. The flight was conducted normally with no abnormalities throughout the departure; climb; cruise; descent and approach phases. The actual landing was also completed without any problems.The Captain was bringing the aircraft to taxi speed using brakes and thrust reverse after touchdown; using moderate braking effort. At a speed [of] approximately 20-30 knots; the Captain was preparing to initiate a turn to the left off [the] runway onto the taxiway when an uncommanded turn to the right began. The turn increased in severity and by the time the Captain was able to bring the aircraft to a complete stop; the aircraft was approximately 90 degrees to the right of runway heading. As the turn progressed and it became clear that we would not be able to immediately exit the active runway; I made a radio call to Tower that we had an issue on the runway and would not make the taxiway. After we had come to a stop and the Captain was able to re-engage the nose wheel steering; we taxied off the runway onto the taxiway and notified Tower that we would be able to exit the runway under our own power. Tower asked if we needed assistance and if we had any requests. We declined assistance and stated our request to taxi to the ramp. Tower transferred us to Ground Control where; after confirming that we did not need assistance; were cleared to taxi to the ramp. We informed Ground Control that the reason for the delay on the runway was due to a nose wheel steering fault; and they acknowledged.I cannot think of anything that could have been done to improve the situation. It happened quickly and the resolution likewise was done quickly. We spent minimum extra time on the runway given the circumstance. The nose wheel steering functioned properly after being re-engaged for the taxi to the ramp.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.