NTSB CAROL · Event
Event CHI03IA257
Aircraft involved
Probable cause & findings
A partial failure of the rudder control lock fairlead which jammed the rudder cable during takeoff.
Factual narrative
On August 9, 2003, at 1214 central daylight time, a Cessna 650, N122EJ, operated by Thunder Air Charter, experienced a jammed rudder just after liftoff from the Spirit of St. Louis Airport (SUS), Chesterfield, Missouri. The captain and co-pilot were not injured. The airplane was not damaged. The 14 CFR Part 91 positioning flight was operating in visual meteorological conditions and an instrument flight rules flight plan was filed. The intended destination for the flight was Kirksville, Missouri. However, following the takeoff the flight crew remained in the vicinity of SUS while they evaluated the situation. They then elected to return to SUS where an uneventful landing was made at 1242. The captain reported the rudder jammed in the centered position on takeoff. He attempted to free the rudder several times by using the rudder pedals to no avail. The flight crew informed the tower of the problem and stated they wanted to stay in the area to troubleshoot the situation. The captain reported they performed the "Rudder System Jam" checklist and cycled the auto pilot/yaw damper disconnect button several times to no avail. He stated they checked the circuit breakers, autopilot control panel, rudder bias, hydraulics, electrical system, control lock, control surfaces, and trim settings, all of which appeared normal. The captain stated they then performed two tower fly-bys and they were informed that nothing appeared out of the ordinary. The captain stated there were no problems controlling the airplane inflight, but he was concerned about being able to maintain directional control on the ground, so he declared an emergency and requested that the emergency equipment stand by. He reported that once the airplane was within landing weight limits and the emergency equipment was in place, a normal landing was made. The captain reported that the rudder "unjammed" when the airplane touched down and he was able to taxi the airplane back to the hangar. Inspection of the airplane after the incident revealed that a rudder control locking system fairlead came out of its receptacle. One half of the fairlead was located and the other half was not. The located half was separated into 3 pieces. The Citation's rudder jammed in the centered position just after liftoff. The flight crew reported they did not have any trouble controlling the airplane in flight. The crew stayed near the departure airport as they checked all the systems and attempted to free the rudder. Unable to free the rudder, they declared an emergency and returned to their departure airport where an uneventful landing was made. The rudder freed itself as the airplane touched down. Inspection of the airplane after the incident revealed that a rudder control locking system fairlead came out of its receptacle. One half of the fairlead was located and the other half was not. The located half was separated into 3 pieces. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2003_CHI03IA257.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (autopilot). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- arXiv 2025 · arXiv preprint
ROSflight 2.0: Lean ROS 2-Based Autopilot for Unmanned Aerial Vehicles
ROSflight is a lean, open-source autopilot ecosystem for unmanned aerial vehicles (UAVs). Designed by researchers for researchers, it is built to lower the barrier to entry to UAV research and acceler…
- arXiv 2025 · arXiv preprint
ROSplane 2.0: A Fixed-Wing Autopilot for Research
Unmanned aerial vehicle (UAV) research requires the integration of cutting-edge technology into existing autopilot frameworks.
- arXiv 2024 · arXiv preprint
A Data-Driven Autopilot for Fixed-Wing Aircraft Based on Model Predictive Control
Autopilots for fixed-wing aircraft are typically designed based on linearized aerodynamic models consisting of stability and control derivatives obtained from wind-tunnel testing.
- arXiv 2022 · arXiv preprint
Experimental Flight Testing of a Fault-Tolerant Adaptive Autopilot for Fixed-Wing Aircraft
This paper presents an adaptive autopilot for fixed-wing aircraft and compares its performance with a fixed-gain autopilot.
- arXiv 2021 · arXiv preprint
An Adaptive Digital Autopilot for Fixed-Wing Aircraft with Actuator Faults
This paper develops an adaptive digital autopilot for a fixed-wing aircraft and compares its performance with a fixed-gain autopilot.
- arXiv 2020 · arXiv preprint
Reinforcement Learning for Robust Missile Autopilot Design
Designing missiles' autopilot controllers has been a complex task, given the extensive flight envelope and the nonlinear flight dynamics.
Browse the full corpus — academia portal ↗