Skip to content

CEN11CA438

2011-06-24 · Castroville, Texas, United States · None · 1 aircraft · Status: Completed

Airport CVB

N731ST has since been reassigned. It is now registered to a different aircraft (CIRRUS DESIGN SR22T, built 2025), which was not involved in this event.

Aircraft involved

Probable cause & findings

The pilot's failure to maintain obstacle clearance during the agricultural spraying flight.

Factual narrative

The commercial pilot was making his first spraying pass of the day when the agricultural airplane struck and damaged a center pivot irrigation system. The impact damaged the irrigation system, and the right main landing gear and tail wheel separated from the airplane. The airplane immediately started a descending bank to the right. The pilot reported that the right aileron was jammed in the full up position and control stick movements had no affect on the right aileron. He was able to use full power, full left aileron, and full left rudder to regain partial control and return to the airport for an emergency landing. As the airplane touched down the left main landing gear separated and the airplane came to rest upright with resulting substantial damage to the fuselage and flight controls. The pilot reported there were no mechanical anomalies prior to impact with the irrigation system. He also reported his forward vision was partially obscured by chemical spray on the windshield. The pilot reported that he was conducting agricutural spraying operations in the airplane when the accident occurred. He stated that it was his first pass when he noticed a center pivot irrigation system ahead. His efforts to avoid hitting the irrigation system were unsuccessful. After striking the irrigation system he noted that he had almost no aileron control. He was able to use full power, full left aileron, and full left rudder to regain partial control and return to the airport for an emergency landing. As the airplane touched down the left main landing gear separated and the airplane came to rest upright resulting in substantial damage to the fuselage and flight controls. The pilot reported there were no mechanical anomalies prior to impact with the irrigation system. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-(general)-Not attained/maintained - C
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Environmental issues-Task environment-Physical workspace-Visibility-Effect on operation - C

Verbatim from NTSB's published report. Source file NTSB_2011_CEN11CA438.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.