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 ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
- Aviation Safety Network Aviation press ↗
- Kathryn's Report Aviation press ↗
- Aviation Herald Aviation press ↗
- AVweb Aviation press ↗
- Pilots of America Community ↗
- Reddit /r/flying Community ↗
- FlightAware Aviation press ↗
- AOPA accident database Aviation press ↗
- Google News News ↗
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Related research
Matched on aircraft type or causal vocabulary (stall, go-around). All research papers
- NASA NTRS 2023 · Reprint (Version printed in journal) Finite Element Simulation of Three Full-Scale Crash Tests for Cessna 172 Aircraft
The NASA Emergency Locator Transmitter Survivability and Reliability project was initiated in 2013 to assess the crash performance standards for the next generation of emergency locator transmitter (E…
- NASA NTRS 2019 · Conference Paper Crash Testing and Simulation of a Cessna 172 Aircraft: Pitch Down Impact Onto Soft Soil
During the summer of 2015, NASA Langley Research Center conducted three full-scale crash tests of Cessna 172 (C-172) aircraft at the NASA Langley Landing and Impact Research (LandIR) Facility.
- NASA NTRS 2019 · Technical Memorandum (TM) Simulating the Impact Response of Three Full-Scale Crash Tests of Cessna 172 Aircraft
During the summer of 2015, a series of three full-scale crash tests were performed at the Landing and Impact Research Facility located at NASA Langley Research Center of Cessna 172 aircraft.
- NASA NTRS 2026 · Conference Paper Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- NASA NTRS 2025 · Conference Paper A Training Study to Improve Monitoring During A Go-Around
As part of an FAA program to improve go-around (GA) safety, we were asked to determine if we could improve the performance of the Pilot Monitoring (PM) during a GA maneuver.
- Flight Safety Foundation 2024 · FSF / AeroSafety World Go-Around Safety Forum Findings
Foundation Go-Around Safety Forum technical findings — examines why pilots fail to execute go-arounds when criteria are met (stabilized approach gate not met, energy state out of envelope, traffic con…