NTSB CAROL · Event
Event GAA18CA109
Aircraft involved
Probable cause & findings
The pilot’s improper brake application during landing, which resulted in a tire blowout and a loss of directional control.
Factual narrative
The pilot reported that, during approach, he flew the airplane about 10 knots faster than normal due to other traffic's wake turbulence. He added that, while decelerating during the landing roll, the airplane veered to the left. He applied right rudder, but to no avail. The airplane veered off the runway to the left, struck a taxiway sign, and the nose landing gear collapsed. The airplane sustained substantial damage to the pressure vessel. During a postaccident examination, the pilot observed that the left tire had blown out. The tire exhibited a flat, bald spot about the width of the tire. The tire fabric threads were visible around a hole in the tire, consistent with a skid. In a follow up conversation with the National Transportation Safety Board (NTSB) Investigator- In-Charge (IIC), the pilot reported that, during approach, he verified brake hydraulic pressure. He added that he checked that his heels were on the floor and that he was the sole manipulator of the controls during landing. The airport Operations Manager reported that, during the recovery process there were no observed fluids around the main landing gear. He added that the airport surveillance video captured the landing sequence. He observed, from the video, that there was "quite a bit of smoke" from the left tire during touchdown. The airplane's logbooks indicated that the most recent maintenance work was done a month prior to the accident. The mechanic who worked on the airplane reported that the pilot requested work on the oleo struts, but not to the brake system. He added that, during the oleo strut maintenance, the brakes were unbolted and set aside until reassembly. After the oleo strut work was completed, the mechanic ran up the airplane, taxied around, and tested the brake with no observed abnormalities. An NTSB investigator and Federal Aviation Administration inspector examined the wreckage and the NTSB investigator reported that the left brake rotor was normal in color and had minimal wear; the right main landing gear was unremarkable. He added that the brake pedals were actuated, and pressure was heard at both main landing gear brake assemblies. The brake pedal foot pressure was also unremarkable. The pilot reported that, during the approach, he flew the airplane about 10 knots faster than normal due to other traffic's wake turbulence. He added that, while decelerating during the landing roll, the airplane veered to the left. He applied right rudder but to no avail. The airplane veered off the runway to the left, struck a taxiway sign, and the nose landing gear collapsed. The airplane sustained substantial damage to the pressure vessel. During postaccident examination, the pilot observed that the left tire had blown out. The tire exhibited a flat, bald spot about the width of the tire. The tire fabric threads were visible around a hole in the tire, consistent with a skid. In a followup conversation with the National Transportation Safety Board (NTSB) investigator- in-charge (IIC), the pilot reported that, during the approach, he verified brake hydraulic pressure. He added that he checked that his heels were on the floor and that he was the sole manipulator of the controls during landing. The airport Operations Manager reported that, during the recovery process, there were no observed fluids around the main landing gear. He added that the airport surveillance video captured the landing sequence, which showed that there was "quite a bit of smoke" from the left tire during touchdown. The airplane's logbooks indicated that the most recent maintenance work was done a month before the accident. The mechanic who worked on the airplane reported that the pilot requested work on the oleo struts but not to the brake system. He added that, during the oleo strut maintenance, the brakes were unbolted and set aside until reassembly. After the oleo strut work was completed, the mechanic ran up the airplane, taxied around, and tested the brake with no observed abnormalities. An NTSB IIC and Federal Aviation Administration inspector examined the wreckage and the NTSB IIC reported that the left brake rotor was normal in color and had minimal wear; the right main landing gear was unremarkable. He added that the brake pedals were actuated, and pressure was heard at both main landing gear brake assemblies. The brake pedal foot pressure was also unremarkable. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Attain/maintain not possible - C
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
- C Aircraft-Aircraft systems-Landing gear system-Brake-Incorrect use/operation - C
- — Environmental issues-Physical environment-Object/animal/substance-Sign/marker-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2018_GAA18CA109.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 (wake turbulence, turbulence, maintenance). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2019 · Conference Paper
Aircraft wake turbulence minimization by aerodynamic means
The paper reviews NASA's efforts on wake vortex turbulence minimization by aerodynamic design or retrofit modifications to large transport aircraft.
- NASA NTRS 2019 · Conference Paper
Wake Turbulence Mitigation for Arrivals (WTMA)
The preliminary Wake Turbulence Mitigation for Arrivals (WTMA) concept of operations is described in this paper. The WTMA concept provides further detail to work initiated by the Wake Vortex Avoidance…
- NASA NTRS 2019 · Conference Paper
Aircraft wake turbulence avoidance
Aircraft wake turbulence /trailing vortex systems/ avoidance during flight, describing procedures for pilots and tower operators
- NASA NTRS 2019 · Conference Paper
Aircraft wake turbulence progress and plans
Aircraft wake turbulence and trailing vortices, investigating physical characteristics, hazard potential and avoidance techniques
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
Political Turbulence and Aviation Safety: A Cross-National Analysis of Political Stability's Effects on Aviation Accidents
To what extent does political stability affect aviation safety? This research aims to link domestic political conditions and public safety through the consideration of aviation accident frequency.
- SKYbrary (Eurocontrol) 2023 · SKYbrary article
Wake Vortex Turbulence — SKYbrary Knowledge Base
SKYbrary wake vortex turbulence comprehensive article — generation mechanics, dissipation factors, separation standards (ICAO LIGHT/MEDIUM/HEAVY/SUPER + recategorisation RECAT-EU).
Browse the full corpus — academia portal ↗