WPR21LA253
2021-05-10 · Palm Springs, California, United States · None · 1 aircraft · Status: Completed
Airport UDD
Aircraft involved
Probable cause & findings
The Kingair pilot’s failure to maintain clearance from another airplane while taxiing, which resulted in a ground collision.
Factual narrative
The pilot of the Cessna reported that, he turned off the taxiway to perform a functional check of his autopilot and electric trim systems. A few seconds later, the pilot of a Kingair was taxiing and observed the Cessna’s tail partially obstructing the taxiway. The Kingair pilot turned sharply to the left to avoid an impact. As the Cessna pilot was checking his systems, he suddenly felt his airplane lurch forward. The Cessna pilot immediately observed the Kingair pass to his rear left and used the airport’s common traffic advisory frequency to inform the Kingair pilot that he had collided with his airplane. The Kingair pilot denied the ground collision and subsequently tookoff. As a result of the collision, the Cessna’s rudder and vertical stabilizer were substantially damaged. The right-wing winglet of the Kingair displayed minor red paint transfer. The pilots of both airplanes reported that there were no mechanical failures or malfunctions with their airplanes that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- — Personnel issues-Psychological-Attention/monitoring-Monitoring other aircraft-Pilot of other aircraft
- — Environmental issues-Physical environment-Object/animal/substance-Aircraft-Response/compensation
- — Personnel issues-Psychological-Attention/monitoring-Monitoring other aircraft-Pilot
Verbatim from NTSB's published report. Source file
NTSB_2021_WPR21LA253.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
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Related research
Matched on aircraft type or causal vocabulary (autopilot). All research papers
- 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 2026 · arXiv preprint Robust Adaptive Sliding-Mode Control for Damaged Fixed-Wing UAVs
Many unmanned aerial vehicles (UAVs) can remain aerodynamically flyable after sustaining structural or control surface damage, yet insufficient robustness in conventional autopilots often leads to mis…