ANC99LA036

NTSB accident investigation · Eurocopter AS-350-B2 · Girdwood, AK · March 17, 1999

Accident · No injuriesLimited investigationFinal report
Date
March 17, 1999, 10:50 local (14:50 UTC)
Place
Girdwood, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N197EHEurocopter AS-350-B2
Weather
Visual (VMC) · Day
Status
Completed · report April 20, 2000
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19990317002439A
Case key
45963

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 misjudged flare while landing. Factors associated with the accident were whiteout conditions, and snow-covered terrain.

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 encounter with weatherLanding
Weather condition - whiteoutFactor
Hard landingLanding
Flare - misjudgedPilot in commandCause
Terrain condition - snow coveredFactor
Roll overLanding

Analysis

The commercial pilot reported that the accident helicopter was being utilized to transport skiers to a remote ski area. He added that the day before the accident, the area had received about 6 inches of very light, powder snow. He stated that just before the accident, he transported a group of photographers to the top of the mountain, and he was returning to the base of the mountain to pick up the next group of skiers. He said that as the helicopter hovered toward the landing area, he became disoriented in whiteout conditions, and lost all visual reference due to blowing snow. He said the helicopter drifted to the right, the right skid struck the snow, and the helicopter rolled onto its right side. The helicopter sustained substantial damage to the fuselage, tail boom, and drive train components.

Factual narrative

On March 17, 1999, about 1050 Alaska standard time, a high skid equipped Eurocopter AS-350-B2 helicopter, N197EH, sustained substantial damage during landing, about 12 miles south of Girdwood, Alaska. The helicopter was being operated as a visual flight rules (VFR) on-demand air taxi flight under Title 14, CFR Part 135, when the accident occurred. The helicopter is registered to, and operated by, ERA Aviation, Anchorage, Alaska. The certificated commercial pilot, the sole occupant aboard, was not injured. Visual meteorological conditions prevailed, and VFR company flight following procedures were in effect. The flight originated at the Girdwood Airport about 0810.

During an interview with the National Transportation Safety Board investigator-in-charge on March 17, the pilot reported that the accident helicopter was operating under contract to Chugach Powder Guides to transport skiers to a remote ski area. He added that the day before the accident, the area had received about 6 inches of very light, powder snow. He stated that just before the accident, he transported a group of photographers to the top of the mountain, and he was returning to the base of the mountain to pick up the next group of skiers. He said that as the helicopter hovered toward the landing area, he became disoriented in whiteout conditions, and lost all visual reference due to blowing snow. He said the helicopter drifted to the right, the right skid struck the snow, and the helicopter rolled onto its right side.

The helicopter sustained substantial damage to the fuselage, tail boom, and drive train components.

Aircraft

Registration
N197EH
Reported as
Eurocopter AS-350-B2
Category
Helicopter
Serial number
2983
Airframe hours
796
Engine
Turbomeca ARRIEL 1D1, 732 horsepower, turbo shaft
Damage
Substantial damage
Flight
Part 135
Registered owner
Era Aviation, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · April 24, 1999 · 21 hours before
Departed
AQY · AK
Flight plan
Company VFR

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
51
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
8,520 total · 3,340 in this make and model · 8,125 as pilot in command · 10 in the last 90 days · 10 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
None
Temperature
36 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

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

Other investigations on N197EH · 1

Matched to the same aircraft by N-number and date.