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Atlas / NTSB / GAA17CA456

NTSB CAROL · Event

Event GAA17CA456

2017-07-29 Mocksville, North Carolina, United States Airport · 43NC None 1 aircraft Status: Completed

Registry · N817V

FAA Aircraft Registry record.

Make / Model

RANS S-6

Year of manufacture

2025

Engine

ROTAX 912UL SERIES (80 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

20250821

ADS-B equipped

Yes — Mode-S AB2538

Registrant of record

VIERRA AARON M

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot’s improper landing flare in gusting wind conditions.

Factual narrative

The glider pilot reported that, during landing in gusting wind conditions, the glider bounced, so the pilot added "more spoiler" to help the glider settle back onto the ground. He added that a gust of wind "rotated" the glider to the left and the glider bounced again, about 3-4 ft into the air. After the second bounce, the glider landed hard "with the nose yawed to the left". The glider sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the glider that would have precluded normal operation. A review of recorded data from the automated weather observation station located 16 nautical miles east from the accident airport reported that, about 40 minutes before the accident, the wind was from 30° at 17 knots, gusting 20 knots. The pilot reported that the wind was from 360° at 15 knots, gusting to 20 knots. The glider landed on runway 1. The glider pilot reported that, during landing in gusting wind conditions, the glider bounced, so the pilot added "more spoiler" to help the glider settle back onto the ground. He added that a wind gust "rotated" the glider to the left, and the glider bounced about 3 to 4 ft. After the second bounce, the glider landed hard "with the nose yawed to the left." The glider sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the glider that would have precluded normal operation. A review of recorded data from the automated weather observation station located 16 nautical miles east of the accident airport reported that, about 40 minutes before the accident, the wind was from 30° at 17 knots, gusting to 20 knots. The pilot reported that the wind was from 360° at 15 knots, gusting to 20 knots. The glider landed on runway 1. 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-Landing flare-Not attained/maintained - C
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • Environmental issues-Conditions/weather/phenomena-Wind-Gusts-Effect on operation

Verbatim from NTSB's published report. Source file NTSB_2017_GAA17CA456.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.