GAA18CA234
2018-04-24 · Wickenburg, Arizona, United States · None · 1 aircraft · Status: Completed
Airport E25
N922PA has since been reassigned. It is now registered to a different aircraft (AMAZON.COM SERVICES LLC MK30), which was not involved in this event.
Aircraft involved
Probable cause & findings
The student pilot’s failure to relinquish flight controls and premature flap reduction during approach to land.
Factual narrative
The flight instructor reported that, while abeam the intended touchdown point, he reduced power to idle for the student pilot to perform a simulated engine failure approach. The student pilot maneuvered for the runway and added full flaps (40°), decreasing airspeed to about 62 to 68 knots. The instructor asked the student if he believed he would be able to make the runway given his airspeed, and the student pilot retracted the flaps to 0° and then back to 25°. The airplane began to sink, the flight instructor added full flaps to "regain some lift", and he instructed the student pilot to recover. The student pilot put both hands on the yoke and pitched up. The flight instructor said, "my controls", applied full power, and attempted to lower the nose, but the student pilot froze and continued to pitch up. The flight instructor repeated the exchange of flight controls command, the student pilot released control of the yoke and retracted the flaps to 0°. The flight instructor put the flaps back to 25° and pitched the nose down in an attempt to recover. The airplane struck the top of a tree, the flight instructor reduced power and landed short of the runway; the nose landing gear collapsed. The airplane sustained substantial damage to both wings and empennage. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The Federal Aviation Administration inspector reported that, after conducting interviews, it was revealed that the flight instructor took control of the airplane "well below 500 feet from the ground". He also added that there may have been a communication barrier between the flight instructor and the student pilot. He reported that the student pilot paused for 20 to 30 seconds to comprehend each question before answering. The flight instructor reported that, while abeam the intended touchdown point, he reduced power to idle for the student pilot to perform a simulated engine failure approach. The student pilot maneuvered for the runway and added full flaps (40°), decreasing airspeed to about 62 to 68 knots. The instructor asked the student if he believed he would be able to make the runway given his airspeed, and the student pilot retracted the flaps to 0° and then back to 25°. The airplane began to sink, the flight instructor added full flaps to "regain some lift," and he instructed the student pilot to recover. The student pilot put both hands on the yoke and pitched up. The flight instructor said "my controls," applied full power, and attempted to lower the nose, but the student pilot froze and continued to pitch up. The flight instructor repeated the exchange of flight controls command, the student pilot released control of the yoke and retracted the flaps to 0°. The flight instructor put the flaps back to 25° and pitched the nose down in an attempt to recover. The airplane struck the top of a tree, the flight instructor reduced power and landed short of the runway; the nose landing gear collapsed. The airplane sustained substantial damage to both wings and empennage. The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The Federal Aviation Administration inspector reported that, after conducting interviews, it was revealed that the flight instructor took control of the airplane "well below 500 feet from the ground." He also added that there may have been a communication barrier between the flight instructor and the student pilot. He reported that the student pilot paused for 20 to 30 seconds to comprehend each question before answering. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- C Aircraft-Aircraft systems-Flight control system-TE flap control system-Incorrect use/operation - C
- C Personnel issues-Action/decision-Action-Incorrect action performance-Student/instructed pilot - C
- C Personnel issues-Action/decision-Action-Lack of action-Student/instructed pilot - C
- — Personnel issues-Experience/knowledge-Knowledge-Reading/language comprehension-Student/instructed pilot
- — Environmental issues-Physical environment-Object/animal/substance-Tree(s)-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2018_GAA18CA234.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.
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Related research
Matched on aircraft type or causal vocabulary (engine failure). All research papers
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Traditional probabilistic risk assessment approaches often require failure scenarios to be explicitly defined through event sequences that are then quantified as part of the integrated analysis.
- NASA NTRS 2019 · Conference Paper Rocket engine failure detection using system identification techiques
The theoretical foundation and application of two univariate failure detection algorithms to Space Shuttle Main Engine (SSME) test firing data is presented.
- NASA NTRS 2019 · Conference Paper Rocket engine failure detection using system identification techniques
The theoretical foundation and application of two univariate failure detection algorithms to Space Shuttle Main Engine (SSME) test firing data is presented.
- NASA NTRS 2019 · Technical Memorandum (TM) A simulator investigation of engine failure compensation for powered-lift STOL aircraft
A piloted simulator investigation of various engine failure compensation concepts for powered-lift STOL aircraft was carried out at the Ames Research Center.
- Semantic Scholar 2019 · Article (AIAA Scitech 2019 Forum) Impact of Engine Failure Constraints on the Initial Sizing of Hybrid-Electric GA Aircraft
Potential advantages of hybrid-electric aircraft are fuel savings, lower emissions, and reduced noise. Since these aircraft generally apply multiple power sources, they can also be designed to sustain…