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CEN26LA035

2025-11-04 · Grantsburg, Wisconsin, United States · None · 1 aircraft · Status: Completed

Airport GTG

Current FAA registration · N9490H

Make / Model
CESSNA 172M
Year of manufacture
1975 · 50 years old at event
Engine
LYCOMING 0-320 SERIES (180 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19751031
ADS-B equipped
Yes — Mode-S AD30F7

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The collision with a white-tail deer during the landing in dark night visual conditions.

Factual narrative

The pilot reported that the airplane was on final approach to the runway in dark night visual conditions with no moon illumination present. She observed that the airport lighting seemed dim and the area surrounding the runway was not illuminated. When she initiated the landing flare, she observed a white-tailed deer running across the runway from the right to the left. She initiated a go-around; however, the deer impacted the right horizontal stabilizer. During the go-around, she noticed a reduced climb performance and a right yaw, however she was able to safely control the airplane. She decided to divert to a different airport due to the possibility of additional deer being present near the runway or perhaps a dead deer on the runway. The pilot contacted air traffic control and landed at a nearby airport without further incident. The right horizontal stabilizer sustained substantial damage. The pilot reported there were no preimpact mechanical malfunctions or failures with the airframe or the engine that would have precluded normal operation. The current airport entry in the FAA Airport/Facility Directory states in the remarks section, “deer & waterfowl on and invof arpt.” According to the University of Wisconsin, white-tail deer prefer an open forest environment consisting of meadows, woodland clearings and farmland and additionally prefer low light to forage, mainly at sunrise and sunset. The accident occurred about 1 hour and 38 minutes after sunset. The publicly owned airport, which is located next to a 30,000-acre state wildlife area, does not have fencing installed to exclude deer and other mammals, nor is it required to. The FAA has published CertAlert 16-03 Recommended Wildlife Exclusion Fencing and states in part: Proper fencing is the best way of keeping deer and coyotes off aircraft movement areas. The FAA recommends a 10-foot fence with 3-strand barbed wire outriggers. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • — Environmental issues-Physical environment-Object/animal/substance-Animal(s)/bird(s)-Effect on equipment
  • — Environmental issues-Physical environment-Object/animal/substance-Animal(s)/bird(s)-Contributed to outcome
  • — Environmental issues-Physical environment-Object/animal/substance-Animal(s)/bird(s)-Awareness of condition
  • — Environmental issues-Physical environment-Object/animal/substance-Animal(s)/bird(s)-Ability to respond/compensate
  • — Environmental issues-Conditions/weather/phenomena-Light condition-Dark-Awareness of condition

Verbatim from NTSB's published report. Source file NTSB_2025_CEN26LA035.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (stall, go-around). All research papers