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Atlas / NTSB / CEN11CA545

NTSB CAROL · Event

Event CEN11CA545

2011-07-28 Forest City, Iowa, United States None 1 aircraft Status: Completed

Registry · N331BF

FAA Aircraft Registry record.

Make / Model

AYRES CORPORATION S2R-G6

Year of manufacture

1992 · 19 years old at event

Engine

AIRESEARCH TPE331-5&6SER (776 hp)

Seats / Engines

1 seats · 1 engine

Last airworthiness date

19920309

ADS-B equipped

Yes — Mode-S A399A5

Registrant of record

MCGUIRE ROB

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's inadequate visual lookout during an aerial application run, which resulted in an in-flight collision with a windmill.

Factual narrative

The agricultural pilot had completed a spray run and pulled up to clear trees at the end of the field. The pilot reported that several trees and windmills were located at the southern end of the field and as the airplane made a climbing left turn, the right wing struck a windmill blade. The collision tore the spray boom from the airplane, which then impacted the airplane’s right side stabilizer and fuselage, causing substantial damage. The pilot was able to perform a successful precautionary landing on a nearby gravel road. During an aerial application flight, the pilot had completed a spray run and initiated a climb to clear trees at the end of the field. The pilot reported that several trees and windmills were located at the southern end of the field and as the airplane made a climbing left turn, the right wing struck a windmill blade. The collision tore the spray boom from the airplane, which then impacted the airplane’s right side stabilizer and fuselage, causing substantial damage. The pilot was able to perform a successful landing on a nearby gravel road. 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-(general)-(general)-Pilot - C

Verbatim from NTSB's published report. Source file NTSB_2011_CEN11CA545.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.