ANC09LA031

NTSB accident investigation · Aerospatiale AS350 B2 E · Haines, AK · April 13, 2009

Accident · Serious injuriesLimited investigationFinal report
Date
April 12, 2009, 18:00 local (Apr 13, 2009, 02:00 UTC)
Place
Haines, AK
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N208CHAerospatiale AS350 B2 E
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 2009
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA, Juneau FSDO
FAA report
20090412046999A
Case key
73638

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 from snow-covered terrain during the landing approach in flat light conditions.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedAerospatiale AS350 B2 ECUREUIL: 2 casesAll aircraft: 1,310 casesProbable cause
Light condition: flat lightEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeAerospatiale AS350 B2 ECUREUIL: 1 caseAll aircraft: 42 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The solo airline transport helicopter pilot reported that he was on a Title 14, CFR Part 91 positioning flight and was approaching an off-airport landing site on a snow-covered glacier to pick up skiers. He said as he neared the site, he inadvertently flew the helicopter into an unseen rise, resulting in substantial damage to the helicopter and serious injuries to himself. He said he had just flown from bright sunlight into shade, and due to the prevailing flat light, he was unable to discern his height above the glacier. The pilot noted that there were no preaccident mechanical problems with the helicopter.

Factual narrative

On April 12, 2009, about 1800 Alaska daylight time, an Aerospatiale AS-350 B2 E helicopter, N208CH, operated by Coastal Helicopters, Juneau, Alaska as a Part 91 positioning flight to pick up skiers, sustained substantial damage when it collided with a snow-covered glacier, about 32 miles northwest of Haines, Alaska. The solo airline transport certificated pilot received serious injuries. The flight originated from Mile 33 of the Haines Highway about 1750, and was en route to the Little Jarvis Glacier to pick up skiers at the bottom of the glacier. Visual meteorological conditions prevailed, and a company flight plan was in effect. In a telephone conversation with the NTSB investigator-in-charge (IIC) on April 16, the general manager of Coastal Helicopters said the pilot had been taking skiers to various locations in the general area of the accident to ski down the slopes, and would then pick them up at the bottom. The manager related that the flight to the Little Jarvis Glacier was not the pilot's first landing at this site the day of the accident, but he approached it from a slightly different direction and at a shallower angle than previously. During the accident flight's approach to the landing site, the manager indicated the pilot told him he flew into a small, unseen rise on the glacier, hit hard, bounced about 5 feet into the air, and spun about the vertical axis three times before descending onto the glacier near the initial impact point. The general manager said the pilot reported no mechanical problems with the helicopter prior to the accident. He also noted the pilot told him he had just flown from bright sunshine into shadow, and due to the all white surface of the glacier and flat lighting conditions, he was unable to accurately gauge his height above the glacier. A telephone interview on April 20 with the FAA inspector from the Juneau Flight Standards District Office who interviewed the pilot on April 17, disclosed the same information. The accident pilot also submitted a written statement to the NTSB dated April 14, which was consistent with the FAA inspector's and general manager's statements. The pilot noted that there were no preaccident mechanical problems with the helicopter.

Aircraft

Registration
N208CH
Reported as
Aerospatiale AS350 B2 E
Category
Helicopter
Serial number
2452
Airframe hours
7,389
Engine
Honeywell LTS101-700D2, 650 horsepower, turbo shaft
Damage
Substantial damage
Flight
Positioning · Part 91
Operator
Coastal Helicopters
Registered owner
Coastal Helicopters Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 21, 2009
Departed
Haines, AK
Destination
Haines, 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
63
Injuries
Serious
Certificate
Airline transport
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
February 12, 2009
Flight hours
9,960 total · 1,935 in this make and model · 140 in the last 90 days · 84 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
50 statute miles
Lowest ceiling
None
Temperature
16 °F

Docket · 1

The files NTSB released with the investigation on September 14, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 638 KB in all.

FAA reports on this event · 1

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