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C172S instructor pilot reported loss of rudder pedal steering during taxi resulting in a taxiway excursion.
| Attributes | |
| ACN | 1577093 |
| Time | |
| Date | 201809 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Taxi |
| Component | |
| Aircraft Component | Rudder Control System |
| Person 1 | |
| Function | Instructor Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Multiengine Flight Crew Commercial Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 360 Flight Crew Total 730 Flight Crew Type 122 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Ground Event / Encounter Loss Of Aircraft Control Ground Excursion Taxiway |
Narrative:
After instructing my student on conducting a thorough preflight inspection of the aircraft involved by following our company checklist; we entered the aircraft and proceeded to follow the engine starting checklist. After starting the engine and conducting the 'before taxi' checklist; I called ZZZ ground and received taxi clearance to runway xx via [two taxiways]. Upon beginning our taxi roll; we initiated a brake check and received a normal response; as expected. We made a series of right and left turns to exit the ramp; with the aircraft responding to all of them normally. As we were about to turn left onto taxiway [the second taxiway] from [the first taxiway]; my student applied force to the left rudder pedal; however; the aircraft did not turn. He then applied full left brake; but again; the aircraft did not turn. At this point; I assisted on the controls and applied full left rudder pedal and brake; only to have the aircraft not respond. I then assumed full control of the aircraft and reduced our engine power to idle as we slowly coasted into the grass off of [the second taxiway]. After a brief radio exchange with the ground controller; I attempted to return the aircraft to the pavement via a series of right turns; and received clearance to taxi back to the ramp via [the first taxiway]. Upon returning to the paved taxiway; I was able to obtain some response from the aircraft; and initiated a gentle left turn into the ramp; where I conducted a series of right and left turns to see if the aircraft would continue to respond (it did; but sluggishly). After shutting down; I called the ground controller via cell phone to briefly discuss what we believe occurred; and to verify that there was no noticeable damage to the aircraft resulting from the pavement departure. Upon asking if he required anything else from me; he replied in the negative; and the phone call terminated. I then contacted company maintenance personnel to have them inspect the aircraft; and a company manager also arrived.at no time did our aircraft pose a collision hazard to another aircraft. We also remained clear of the runway safety area at all times; so there was no runway incursion associated with this event.
Original NASA ASRS Text
Title: C172S Instructor Pilot reported loss of rudder pedal steering during taxi resulting in a taxiway excursion.
Narrative: After instructing my student on conducting a thorough preflight inspection of the aircraft involved by following our company checklist; we entered the aircraft and proceeded to follow the Engine Starting Checklist. After starting the engine and conducting the 'Before Taxi' Checklist; I called ZZZ Ground and received taxi clearance to Runway XX via [two taxiways]. Upon beginning our taxi roll; we initiated a brake check and received a normal response; as expected. We made a series of right and left turns to exit the ramp; with the aircraft responding to all of them normally. As we were about to turn left onto taxiway [the second taxiway] from [the first taxiway]; my student applied force to the left rudder pedal; however; the aircraft did not turn. He then applied full left brake; but again; the aircraft did not turn. At this point; I assisted on the controls and applied full left rudder pedal and brake; only to have the aircraft not respond. I then assumed full control of the aircraft and reduced our engine power to idle as we slowly coasted into the grass off of [the second taxiway]. After a brief radio exchange with the Ground Controller; I attempted to return the aircraft to the pavement via a series of right turns; and received clearance to taxi back to the ramp via [the first taxiway]. Upon returning to the paved taxiway; I was able to obtain some response from the aircraft; and initiated a gentle left turn into the ramp; where I conducted a series of right and left turns to see if the aircraft would continue to respond (it did; but sluggishly). After shutting down; I called the Ground Controller via cell phone to briefly discuss what we believe occurred; and to verify that there was no noticeable damage to the aircraft resulting from the pavement departure. Upon asking if he required anything else from me; he replied in the negative; and the phone call terminated. I then contacted company maintenance personnel to have them inspect the aircraft; and a company manager also arrived.At no time did our aircraft pose a collision hazard to another aircraft. We also remained clear of the runway safety area at all times; so there was no runway incursion associated with this event.
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.