ANC94LA123

NTSB accident investigation · Helio H295 · Artic Village, AK · August 20, 1994

Accident · No injuriesLimited investigationFinal report
Date
August 19, 1994, 20:00 local (Aug 20, 1994, 04:00 UTC)
Place
Artic Village, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N6DBHelio H295
Weather
Visual (VMC) · Day
Status
Completed · report May 9, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19940819022639A
Case key
2555

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 selected unsuitable terrain for landing. A factor was the hidden obstruction (hole).

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/waterLanding - roll
Terrain condition - hidden obstruction(s)Factor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Tail gear collapsedLanding - roll
Ground loop/swerve

Analysis

The pilot, the sole occupant, was completing a cross-country CFR part 135 flight to deliver fuel and supplies to hunters in a remote area. The pilot was landing on a 700 foot long tundra bench in a tundra tire equipped short takeoff and landing (stol) airplane. During the landing roll, the left main wheel struck a marmot hole that was not visible from the air. The left tire deflated and the airplane ground looped. The airplane received damage to the left wing and tail wheel assembly.

Factual narrative

On August 19, 1994, at 2000 Alaska daylight time, a tundra tire equipped Helio Courier model H295 airplane, N6DB, owned and operated by the pilot-in-command, dba Pyxis Ltd., collided with a marmot hole during the landing rollout at a remote landing site on the upper Aichilik River, approximately 80 miles northeast of Arctic Village, Alaska. The commercial certificated pilot, the sole occupant, was not injured, and the airplane sustained substantial damage. The pilot reported that the flight was conducted under CFR Part 135 for the purpose of checking on sheep hunters. The flight last departed Fort Yukon, Alaska, at 1830 and the intended destination was the remote strip. Visual meteorological conditions prevailed in the area and a VFR flight plan was in effect with the Fairbanks Flight Service Station.

The pilot indicated that he was landing on a 700 foot long tundra bench with a load of fuel and supplies for the hunters. During the landing roll, the left main wheel struck a hole that was not visible from the air. The collision flattened the left tire and the airplane ground looped. The airplane received damage to the left wing and tail wheel assembly.

Aircraft

Registration
N6DB
Reported as
Helio H295
Category
Airplane
Serial number
1466
Airframe hours
1,380
Engine
Lycoming GO-480-G1A6, 295 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Pyxis Ltd.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 8, 1994 · 20 hours before
Departed
FYU · Fort Yukon, AK
Flight plan
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
43
Certificates
Airline transport, Flight instructor, Commercial
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
2,960 total · 220 in this make and model · 2,771 as pilot in command · 216 in the last 90 days · 48 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
45° at 5 knots
Visibility
5 statute miles
Lowest ceiling
8,000 ft broken
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 N6DB · 1

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