Skip to content

Atlas / NTSB / GAA17CA451

NTSB CAROL · Event

Event GAA17CA451

2017-07-28 Oshkosh, Wisconsin, United States Airport · OSH None 1 aircraft Status: Completed

Registry · N410BP

FAA Aircraft Registry record.

Make / Model

AVIPRO AIRCRAFT LTD BEARHAWK

Year of manufacture

2012 · 5 years old at event

Engine

LYCOMING O-360 SERIES (180 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

20120209

ADS-B equipped

Yes — Mode-S A4D447

Registrant of record

WEISS MICHAEL K

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's failure to maintain directional control during the landing roll in crosswind conditions, which resulted in a ground loop.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that, during the landing roll in crosswind conditions, when "transitioning from rudder to braking the tail started rapidly swinging to the left due to wind." He added that "rudder correction was ineffective" and he applied wheel brakes, but the airplane continued in the ground loop clockwise, the left main landing gear collapsed, and the left wing impacted the runway. The left wing sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. An automated weather observation station, about the time of the accident, at the accident airport, reported wind from 040° at 8 knots. The pilot reported that while on short final the air traffic tower controller announced, "wind 050 at 12." The pilot added that the landing was on runway 36. The pilot of the tailwheel-equipped airplane reported that, during the landing roll in crosswind conditions, when "transitioning from rudder to braking, the tail started rapidly swinging to the left due to wind." He added that "rudder correction was ineffective," and he applied wheel brakes, but the airplane continued in the ground loop clockwise, the left main landing gear collapsed, and the left wing impacted the runway. The left wing sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. An automated weather observation station at the accident airport reported, about the time of the accident, wind from 040° at 8 knots. The pilot reported that, while on short final, the air traffic tower controller announced, "wind 050 at 12." The pilot added that the landing was on runway 36. 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 Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
  • Environmental issues-Conditions/weather/phenomena-Wind-Crosswind-Effect on operation

Verbatim from NTSB's published report. Source file NTSB_2017_GAA17CA451.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.