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Atlas / NTSB / GAA18CA109

NTSB CAROL · Event

Event GAA18CA109

2018-01-16 Scottsdale, Arizona, United States Airport · SDL None 1 aircraft Status: Completed

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 ↗.

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.

Browse the full corpus — academia portal ↗