ANC95LA062

NTSB accident investigation · Aerospatiale AS-350-B2 · Skagway, AK · May 31, 1995

Accident · No injuriesLimited investigationFinal report
Date
May 31, 1995, 10:30 local (18:30 UTC)
Place
Skagway, AK
Injuries
7 uninjured
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N60618Aerospatiale AS-350-B2
Weather
Visual (VMC) · Day
Status
Completed · report November 30, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19950531014389A
Case key
2655

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 selection of unsuitable terrain for landing. Factors in the accident were the uneven and icy 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.

On ground/water encounter with terrain/waterStanding - engine(s) not operating
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Terrain condition - rough/unevenFactor
Terrain condition - icyFactor

Analysis

The passengers and the pilot boarded the helicopter, which was parked on the ferebee glacier's surface. After everyone was strapped into their seats, the helicopter began sliding forward on the ice and gaining speed. The pilot stated the speed did not exceed a brisk walk. The helicopter turned left as it was sliding and the nose of the helicopter rolled into a depression. The helicopter rolled onto its left side. The engine was not running and the rotors were not turning.

Factual narrative

On May 31, 1995, at 1030 Alaska daylight time, a skid equipped helicopter, Aerospatiale AS-350-B2, N60618, slid into a crevasse/depression on the Ferebee Glacier near Skagway, Alaska. The flightseeing flight, operating under 14 CFR Part 135, was preparing to depart the Ferebee Glacier and return to Skagway. A company flight plan was in effect and visual meteorological conditions prevailed. The pilot and the six passengers were not injured and the helicopter received substantial damage.

According to the operator, the passengers and the pilot had just boarded the helicopter and fastened their seatbelts. The engine was not running and the rotor blades were not turning. The helicopter began to slide forward on the glacier's surface, toward a small depression/crevasse. As it slid forward, it angled to the left and followed a depression. According to the pilot, the speed did not exceed that of a "brisk walk." The left front of the helicopter rolled into a depression and the helicopter rolled onto its left side and stopped sliding.

According to the Director of Operations, the pilot submitted to a toxicological test and the results were negative.

Aircraft

Registration
N60618
Reported as
Aerospatiale AS-350-B2
Category
Helicopter
Serial number
Z565
Airframe hours
1,552
Engine
Turbomeca ARRIEL 1D1, 732 horsepower, turbo shaft
Damage
Substantial damage
Flight
Part 135
Registered owner
Temsco Helicopters
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · May 17, 1995 · 66 hours before
Departed
Ferebee Glacier, AK
Destination
SGY · 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
45
Certificate
Commercial
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Toxicology
Performed
Flight hours
2,480 total · 1,000 in this make and model · 42 in the last 90 days · 42 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 15 knots
Visibility
20 statute miles
Lowest ceiling
3,500 ft overcast
Temperature
50 °F

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 N60618 · 1

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