CEN19LA183
2019-06-24 · Greeley, Colorado, United States · None · 1 aircraft · Status: Completed
Airport GXY
Current FAA registration · N5866P
- Make / Model
- PIPER PA-24-250
- Year of manufacture
- 1959 · 60 years old at event
- Engine
- LYCOMING 0-540 SERIES (250 hp)
- Seats / Engines
- 4 seats · 1 engine
- Last airworthiness date
- 19590423
- ADS-B equipped
- Yes — Mode-S A78F6A
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s improper landing flare, which resulted in failure of the right main landing gear and a subsequent loss of control.
Factual narrative
On June 24, 2019, about 1025 mountain daylight time, a Piper PA-24 airplane, N5866P, was substantially damaged when it was involved in an accident near Greeley, Colorado. The private pilot and passenger were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that he completed a touch-and-go landing, which was uneventful, and he planned his next landing to be a full-stop landing. The pilot stated everything "was good" until touching down, when the airplane's right wing “dipped” and the nose veered left, causing the airplane to exit the runway surface. The airplane hit a taxiway light and continued into the grass on the south side of the runway, where it came to rest. A flight instructor who witnessed the accident stated that, during the landing, the nose landing gear hit the runway first and the airplane bounced and became airborne again before he lost sight of it. Examination of the airplane revealed that the side brace stud of the right main gear side brace upper link assembly was disconnected from the main gear side brace support fitting assembly. The roll pin inserted through the threading on the stud that connected to the support fitting was sheared and the threads of the stud were stripped. The push/pull (conduit) cable assembly arm that connected to the main gear side brace upper link assembly and actuated the landing gear was bent upward. No mechanical anomalies that would have precluded normal operation of the landing gear were found. The pilot stated that the final approach and touchdown were uneventful, but then the airplane's right wing “dipped,” the nose veered left, and the airplane departed the runway surface. Witnesses reported that, during the landing, the nose gear contacted the runway first and then the airplane became airborne again. After the second touchdown, the airplane veered left into the grass. Examination of the airplane revealed that the right main landing gear sustained damage consistent with an excessive side load during landing. There was no evidence of a preimpact mechanical malfunction that would have precluded normal operation. Based on the available information, the accident is consistent with the pilot’s improper landing flare, which resulted in touchdown on the runway with a side load on the landing gear, failure of the right main gear, and a loss of control. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- — Personnel issues-Action/decision-Action-Incorrect action performance-Pilot
- — Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained
Verbatim from NTSB's published report. Source file
NTSB_2019_CEN19LA183.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
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Related research
Matched on aircraft type or causal vocabulary (loss of control). All research papers
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER) A Scoping Review of Aviation Loss of Control Inflight Research
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- SKYbrary (Eurocontrol) 2024 · SKYbrary article Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
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- Semantic Scholar 2024 · Article (International Conference on Networking and Services) Risk Assessment of Loss of Control In-Flight Trajectories for Urban Air Mobility Safety
In Urban Air Mobility (UAM), maintaining a minimum separation between aircraft is a safety requirement, which becomes challenging amidst congested air traffic and off-nominal conditions, such as Loss …
- NTSB Aircraft Accident Reports 2022 · Accident report Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation) ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.