NTSB CAROL · Event
Event FTW96LA274
Registry · N521TC
FAA Aircraft Registry record.
Make / Model
HUGHES 369HE
Year of manufacture
1969 · 27 years old at event
TCDS
H3WE · MD HELICOPTERS INC (MDHI)
Engine
ALLISON 250-C20 SER (420 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19940126
ADS-B equipped
Yes — Mode-S A68E51
Registrant of record
TRE AVIATION CORP
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
the pilot's failure to maintain clearance between the tail rotor and a fence while hovering.
Factual narrative
On June 24, 1996, at 0900 mountain daylight time, a Hughes 369HE, N521TC, struck a fence while hovering at the Las Cruces International Airport, Las Cruces, New Mexico. The helicopter was registered to Hex Corporation of Wilmington, Delaware, and operated by a private owner under Title 14 CFR Part 91. Visual meteorological conditions prevailed and a VFR flight plan was filed for the personal cross country flight. The commercial pilot and the 3 passengers were not injured and the helicopter sustained substantial damage. The flight departed Globe, Arizona, 2 hours before the accident. During personal telephone interviews, conducted by the investigator-in-charge, with the pilot, local authorities, the airport manager, and the FAA inspector, the following information was revealed. The helicopter approached the ramp parking area from a taxiway parallel to the ramp. During the landing, after the left skid had contacted the ramp, the pilot brought the helicopter to a hover. While hovering (IGE), the tailrotor struck the top of a chain link fence and the tailrotor and gearbox separated from the aircraft resulting in a loss of control. Subsequently, during the spinning of the helicopter, the pilot lowered the collective, the left skid struck the ramp, and the helicopter came to a stop on its left side. Damage was reported to the tailrotor, tailboom, gearbox, skids, and main rotor blades. During a landing hover (IGE), the tail rotor struck the top of a chain link fence and the tail rotor and gearbox separated from the aircraft. Subsequently, during the spinning of the helicopter, the pilot lowered the collective, the left skid struck the ramp, and the helicopter came to a stop on its left side. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1996_FTW96LA274.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 (loss of control). 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 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article
Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- NTSB Aircraft Accident Reports 2022 · Accident report
Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation)
ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
- NASA NTRS 2021 · Conference Paper
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
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