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GAA15CA163

2015-06-22 · Grosse Ile, Michigan, United States · None · 1 aircraft · Status: Completed

Airport ONZ

Aircraft involved

Probable cause & findings

The airplane's collision with a deer on the unfenced runway during the takeoff roll. Contributing to the accident is the airport's failure to establish a continuous fence between the runway and the nature conservancy.

Factual narrative

The pilot reported that during the takeoff roll, while accelerating through 130 knots, a "faint bump" was felt. The flight crew continued the takeoff and experienced difficulty controlling the airplane, but were able to stabilize the airplane in flight. The flight crew reported that there were no annunciations or warnings on the flight deck, but they were able to identify damage to the leading edge of the right wing. The flight crew diverted to an alternate airport and landed without incident. The airplane sustained substantial damage to the right wing. Following the accident, a deer was found on the runway at the departure airport. The departure airport perimeter is partially fenced and co-exists on an island with a nature conservancy. The pilot reported no mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation prior to hitting the deer. The pilot reported that during the takeoff roll, while accelerating through 130 knots, a "faint bump" was felt. The flight crew continued the takeoff and experienced difficulty controlling the airplane, but were able to stabilize the airplane in flight. The flight crew reported that there were no annunciations or warnings on the flight deck, but they were able to identify damage to the leading edge of the right wing. The flight crew diverted to an alternate airport and landed without incident. The airplane sustained substantial damage to the right wing. Following the accident, a deer was found on the runway at the departure airport. The departure airport perimeter is partially fenced and co-exists on an island with a nature conservancy. The pilot reported no mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation prior to hitting the deer. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Environmental issues-Physical environment-Object/animal/substance-Animal(s)/bird(s)-Effect on equipment - C
  • F Organizational issues-Management-Resources-Adequacy of facilities-Airport - F
  • F Environmental issues-Operating environment-Airport facilities/design-Security-Effect on equipment - F
  • — Organizational issues-Management-(general)-(general)-Other government

Verbatim from NTSB's published report. Source file NTSB_2015_GAA15CA163.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.