NTSB CAROL · Event
Event GAA18CA007
Aircraft involved
Probable cause & findings
The pilot's unstabilized approach at night, which resulted in collision with trees.
Factual narrative
The pilot of the airplane reported that, while on an instrument flight rules approach to land in instrument meteorological conditions at night, he was "a little late descending" on the glide slope. He added that, during the approach, he increased the descent rate and also became "a little right of course". He noticed approach lights, but became "fixated" on the instruments while attempting to correct for being off course. Subsequently, the airplane struck the tops of trees and he immediately pulled up. He landed without further incident. The airplane sustained substantial damage to the right wing, empennage and fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation system at the accident airport reported, about the time of the accident, that the wind was from 140° at 5 knots, visibility ¾ statute mile, light rain, clouds overcast at 200 ft. The pilot landed on runway 9, flying the RNAV (GPS) runway 9 approach. The pilot of the airplane reported that, while on an instrument flight rules approach to land in instrument meteorological conditions at night, he was "a little late descending" on the glideslope. He added that, during the approach, he increased the descent rate and became "a little right of course." He noticed approach lights but became "fixated" on the instruments while attempting to correct for being off course. Subsequently, the airplane struck the tops of trees, and he immediately pulled up. He landed without further incident. The airplane sustained substantial damage to the right wing, empennage, and fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation system at the accident airport reported, about the time of the accident, that the wind was from 140° at 5 knots, visibility 3/4 statute mile, light rain, and clouds overcast at 200 ft. The pilot landed on runway 9 and flew the RNAV GPS runway 9 approach. 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 Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Descent/approach/glide path-Not attained/maintained - C
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
- C Environmental issues-Physical environment-Object/animal/substance-Tree(s)-Effect on operation - C
- — Environmental issues-Conditions/weather/phenomena-Light condition-Dark-Effect on personnel
Verbatim from NTSB's published report. Source file
NTSB_2017_GAA18CA007.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (unstabilized approach). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2023 · Conference paper
Utilizing Deep Learning to Predict Unstabilized Approaches for General Aviation Aircraft
Unstabilized approaches pose a major hazard for general aviation aircraft. In the period from 2009 to 2019, 3,257 general aviation accidents occurred during the landing phase of flight in which loss o…
- NASA NTRS 2019 · Contractor Report (CR)
Flight test investigation of certification issues pertaining to general-aviation-type aircraft with natural laminar flow
Development of Natural Laminar Flow (NLF) technology for application to general aviation-type aircraft has raised some question as to the adequacy of FAR Part 23 for certification of aircraft with sig…
- NTSB Aircraft Accident Reports 2014 · Accident report
Crash during a Nighttime Nonprecision Instrument Approach — UPS 1354
UPS Flight 1354 (A300-600F) Birmingham AL, August 14, 2013. Investigation of UPS 1354 crash short of runway 18 at Birmingham.
Browse the full corpus — academia portal ↗