ANC04LA096

NTSB accident investigation · Piper PA-18 · Paxson, AK · August 26, 2004

Accident · No injuriesLimited investigationFinal report
Date
August 26, 2004, 08:30 local (16:30 UTC)
Place
Paxson, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8597DPiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report February 24, 2005
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-FAI FSDO 01
FAA report
20040826018809A
Case key
59990

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, which resulted in a collision with a rock and subsequent main landing gear collapse during the landing roll. A factor contributing to the accident was rough, uneven 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/waterLanding - roll
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Terrain condition - rough/unevenFactor
Terrain condition - rock(s)/boulder(s)
Main gear collapsedLanding - roll

Analysis

The airline transport certificated pilot was landing a tundra tire-equipped airplane at a remote landing spot at the conclusion of an on-demand passenger flight. The pilot said the landing area was a rocky ledge, about 900 feet long, and about 12 feet wide, located along the edge of a glacier, about 5,500 feet msl. During the landing roll, the right main landing gear collided with a rock, and the gear collapsed. The right wing struck the ground, and received damage to the wing spar. The pilot indicated that the visibility in the area consisted of hazy conditions with smoke and light rain.

Factual narrative

On August 26, 2004, about 0830 Alaska daylight time, a tundra tire-equipped Piper PA-18 airplane, N8597D, sustained substantial damage when the right main landing gear collapsed, and the right wing struck the ground during the landing roll at a remote landing spot, about 28 miles north of Paxson, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country on-demand passenger flight under Title 14, CFR Part 135, when the accident occurred. The airplane was operated by 40 Mile Air Ltd., Tok, Alaska. The airline transport certificated pilot, and the sole passenger, were not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight originated at the Tok Junction Airport, Tok, Alaska, about 0730.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on August 26, the pilot reported that he was landing toward the west along the edge of the Spur Glacier, about 5,500 feet msl. The pilot said the landing area was a rocky ledge, about 900 feet long, and about 12 feet wide. During the landing roll, the right main landing gear collided with a rock, and the gear collapsed. The right wing struck the ground and received damage to the wing spar, outboard of the wing lift strut attach point. The pilot indicated that the visibility in the area consisted of hazy conditions with smoke and light rain.

Aircraft

Registration
N8597D
Reported as
Piper PA-18
Category
Airplane
Serial number
18-6248
Airframe hours
4,512
Engine
Lycoming O-360-A4A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
40 Mile Air Ltd.
Registered owner
RWR Air Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 24, 2004 · 6 hours before
Departed
6K8 · Tok, AK
Destination
Paxson, 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
48
Injuries
None
Certificates
Flight instructor, Commercial, Airline transport
Airplane ratings
Multi-engine land, Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
7,900 total · 1,000 in this make and model · 7,600 as pilot in command · 250 in the last 90 days · 110 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
5 statute miles
Lowest ceiling
5,000 ft broken
Temperature
45 °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 N8597D · 4

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