FTW97TA046

NTSB accident investigation · Aerospatiale AS-355-F1 · Taos, NM · November 23, 1996

Accident · No injuriesFinal report
Date
November 23, 1996, 14:15 local (21:15 UTC)
Place
Taos, NM
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N606SPAerospatiale AS-355-F1
Weather
Visual (VMC) · Day
Status
Completed · report October 14, 1997
Report
Approved by Office Director
FAA report
19961123036599A
Case key
20375

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 directional control. A factor was terrain induced turbulence.

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
Weather condition - turbulence,terrain inducedFactor
Directional control - not maintainedPilot in commandCause
Terrain condition - cliff
Terrain condition - rock(s)/boulder(s)

Analysis

Visual meteorological conditions prevailed for the public use helicopter search and rescue mission to locate and recover a deceased victim from the bottom of a canyon (650 feet deep). Winds from the west at 5 to 10 mph and throughout the day several trips were conducted into the canyon. Upon receiving notification of the location and preparedness to remove the victim, the pilot flew the helicopter to the canyon and hovered the helicopter with a portion of the left skid on a boulder. The rescue team loaded the litter into the cabin on the left side of the helicopter. As the litter was being secured and one of the rescue team members was climbing on board, 'a gust of wind caused the helicopter to yaw to the right.' As the pilot 'attempted to regain directional control, the skid started to slip on the rock, the tail pitched downward, and the vertical fin and tail rotor struck a rock.' The pilot secured the engines and set the helicopter down, straddling a boulder.

Factual narrative

On November 23, 1996, at 1415 mountain standard time, an Aerospatiale AS-355-F1, N606SP, registered to the State of New Mexico, and operated by the New Mexico State Police, as a public use aircraft under Title 14 CFR Part 91, crashed while hovering near Taos, New Mexico. The commercial pilot and the search and rescue personnel aboard the helicopter were not injured. The helicopter sustained substantial damage. Visual meteorological conditions prevailed for the search and rescue mission and a company flight plan was filed. The flight originated from Santa Fe, New Mexico, approximately 0830.

During a telephone interview, conducted by the investigator-in-charge, and on the enclosed statement, the pilot reported the following information. The search mission on the day of the accident was to locate and recover a deceased victim from the bottom of a canyon (650 feet deep) one mile south of the Rio Grande Gorge Bridge, northwest of Taos, New Mexico. Visibility was between 5 and 10 miles with the winds from the west at 5 to 10 mph. Throughout the day several trips were conducted from the base camp area (a 1/8 square mile open grass helipad area) near the west side of the bridge.

Ground rescue personnel located the victim and prepared the litter for transport from the canyon. The pilot flew the helicopter to the canyon and hovered the helicopter south with the tail rotor over the water and clear of the rocks near the shore. The pilot set a portion of the left skid on a boulder and hovered while the rescue team loaded the litter into the cabin on the left side of the helicopter. As the litter was being secured and one of the rescue team members was climbing on board, "a gust of wind caused the helicopter to yaw to the right." As the pilot "attempted to regain directional control, the skid started to slip on the rock, the tail pitched downward, and the vertical fin and tail rotor struck a rock." The pilot secured the engines and set the helicopter down, straddling a boulder. The tail rotor, tail boom, tail rotor gearbox, driveshaft, vertical fin, and skids were damaged.

Aircraft

Registration
N606SP
Reported as
Aerospatiale AS-355-F1
Category
Helicopter
Serial number
5230
Airframe hours
4,006
Engine
Allison 250-C20R, 450 horsepower, turbo shaft
Damage
Substantial damage
Flight
Public aircraft · Part 91
Registered owner
State Of New Mexico
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 11, 1996 · 62 hours before
Departed
SAF · Santa Fe, NM
Flight plan
Company VFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
35
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
2,163 total · 741 in this make and model · 1,911 as pilot in command · 72 in the last 90 days · 30 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 10 knots
Visibility
10 statute miles
Lowest ceiling
3,000 ft overcast
Temperature
43 °F

FAA reports on this event · 1

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