Aircraft Accident/Incident Report

Deadhorse, Alaska 99734
Friday, April 30, 2004 19:20 AKD

NTSB Narrative Summary Released at Completion of Accident

The commercial helicopter pilot was flying three passengers to several remote sites in northern Alaska to collect snow samples. The snow was being collected from flat, featureless terrain. The pilot said that he was able to reach five of the six predetermined sites, but was unable to reach the sixth site due to low fog, reduced visibility, and flat light conditions. While attempting to return to the base camp, he encountered an area of low fog, which reduced his ability to discern a horizon. He said that the visibility diminished so that he was unable to discern any topographic features, and he elected to make a precautionary landing to wait for improved visibility. After about 3 minutes, he decided to return to the base camp. Just after takeoff, flat light conditions, and worsening fog conditions, reduced his ability to recognize any topographical features on the snow-covered tundra. He said that he initiated another landing, and lowered the collective when he believed the landing gear skids were on the ground. The skids were not on the ground, and the helicopter subsequently descended, and rolled to the right on ground contact. The helicopter continued to roll to the right, and the main rotor blades struck the ground. After striking the ground, the main rotor blades sheered off, and one main rotor blade struck the top left portion of the helicopter's cabin, passed through the left side of the cabin, and struck the passenger seated in the front left seat. The pilot reported that there were no preaccident mechanical anomalies with the helicopter.

NTSB Probable Cause Narrative

The pilot's continued VFR flight into instrument meteorological conditions (IMC), and his spatial disorientation and loss of control during a subsequent landing. Factors associated with the accident are flat light and whiteout conditions, fog, and snow-covered terrain.

Event Information

Type of Event Accident
Event Date 4/30/2004
Event Day of the Week Friday
Time of Event 1920
Event Time Zone --
Event City Deadhorse
Event State ALASKA
Event Country --
Zipcode of the event site 99734
Event Date Year 2004
Event Date Month 4
MidAir Collision Indicator --
On Ground Collision occurred ? --
Event Location Latitude 692800N
Event Location Longitude 1494700W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Full
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height 300
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions --
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 0.5
Air Temperature at event time (in degrees celsius) 0
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) --
Variable Wind Indicator --
Wind Speed (knots) --
Wind Velocity Indicator --
Wind Gust Indicator Unknown
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal 1
Injury Total Minor 1
Injury Total None 2
Injury Total Serious --
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 17650
NTSB Notification Source ANC FAA ROC
NTSB Notification Date Apr 30 2004 12:00AM
NTSB Notification Time 2000
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Jun 8 2005 12:51PM
User who most recently changed record NTSB\JOHB
Basic weather conditions Instrument Meteorological Cond
FAA District Office Fairbanks FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N130AL
NTSB Number ANC04FA049
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 135: Air Taxi & Commuter
Type of Flight Plan filed Company VFR
Flight plan Was Activated? Yes
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Bell
Aircraft Model 206L-3
Aircraft Series Identifier --
Aircraft Serial Number 51462
Certified Max Gross Weight 4150
Aircraft Category Helicopter
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 7
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection AAIP
Date of Last Inspection Apr 29 2004 12:00AM
Airframe hours since last inspection 1.6
Airframe Hours 13305.8
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name AIR LOGISTICS OF ALASKA INC
Aircraft Owner Street Address 1915 Donald Ave
Aircraft Owner City Fairbanks
Aircraft Owner State AK
Aircraft Owner Country USA
Aircraft Owner Zipcode 99701
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code EOPA
Owner has at least one certificate --
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation External Load
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not Non-scheduled
Indicates Domestic or International Flight Domestic
Operator carrying Pax/Cargo/Mail Passenger Only
Type of Flying (Per_Bus / Primary) --
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code SCC
Departure City Deadhorse
Departure State AK
Departure Country USA
Departure Time 1600
Departure Time Zone ADT
Destination Same as Local Flt crash at destination city
Destination Airport Code SCC
Destination City Deadhorse
Destination State AK
Destination Country USA
Specific Phase of Flight Landing - flare/touchdown
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record --
User who most recently changed record --
Since inspection or accident Time of Accident
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --