FTW96LA274

NTSB accident investigation · Hughes 369HE · Las Cruces, NM · June 24, 1996

Accident · No injuriesLimited investigationFinal report
Date
June 24, 1996, 09:00 local (15:00 UTC)
Place
Las Cruces, NM
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N521TCHughes 369HE
Weather
Instrument (IMC) · Day
Status
Completed · report September 24, 1996
Report
Approved by Office Director
FAA report
19960624015059A
Case key
19882

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

the pilot's failure to maintain clearance between the tail rotor and a fence while hovering.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectHover - in ground effect
Object - fence
Clearance - not maintainedPilot in commandCause
Loss of control - in flightHover - in ground effect
In flight collision with terrain/waterDescent - uncontrolled

Analysis

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.

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.

Aircraft

Registration
N521TC
Reported as
Hughes 369HE
Category
Helicopter
Serial number
1090201E
Airframe hours
5,822
Engine
Allison 250C-18B, 317 horsepower, turbo shaft
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Werner Hagel
Registered owner
Hex Corporation
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 10, 1996 · 21 hours before
Departed
P13 · Globe, AZ
Destination
LRU
Flight plan
VFR
Airport
LRU · Las Cruces International

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
46
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
240 total · 120 in this make and model

Weather

Conditions
Instrument (IMC) · Day
Wind
Calm
Visibility
40 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 34 °F
Altimeter
30.00 inHg
Observed at
LRU

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.