ANC95TA068

NTSB accident investigation · Piper PA-18-160 · Tyonek, AK · June 4, 1995

Accident · No injuriesFinal report
Date
June 4, 1995, 09:45 local (17:45 UTC)
Place
Tyonek, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N2400SPiper PA-18-160
Weather
Visual (VMC) · Day
Status
Completed · report November 30, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19950604039789A
Case key
2749

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/takeoff. Factors associated with the accident are the long and wet grass covering the unimproved takeoff area.

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.

Loss of control - on ground/waterTakeoff - roll/run
Terrain condition - grassFactor
Terrain condition - wetFactor
Directional control - not maintainedPilot in command
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Dragged wing,rotor,pod,float or tail/skidTakeoff - roll/run
Nose downTakeoff - aborted

Analysis

The Alaska state trooper pilot landed at an off airport site adjacent to a river to apprehend an apparent violator of the state's fish and game laws. The landing site was covered with long grass and pockets of water. Following the enforcement action, the pilot attempted to takeoff from the approximately 1,200' long 'strip'. The airplane failed to become airborne prior to reaching an area of taller grass and deeper water, and the pilot elected to abort the takeoff. The airplane subsequently ground-looped and nosed down. No pretakeoff mechanical anomalies were claimed or discovered.

Factual narrative

On June 4, 1995, about 0945 Alaska daylight time, a wheel equipped Piper PA-18-160 airplane, N2400S, received substantial damage while attempting to takeoff from an off airport site near the Theodore River, located approximately 15 miles north of Tyonek, Alaska. The Alaska State Trooper commercial certificated pilot and the one passenger aboard were not injured. Visual meteorological conditions prevailed, and a company flight plan was filed. The purpose of the public use flight was for enforcement of the State of Alaska's Fish and Game Regulations.

The pilot said he landed the airplane after he observed what he believed was illegal activity next to the Theodore River. He said after his enforcement action, he attempted to takeoff from the unimproved, wet and grass covered 1,200' long strip. A soft field takeoff was initiated, but the airplane did not become airborne prior to entering an area of deeper water and taller vegetation. The pilot said the airplane did not have sufficient flying speed, and he aborted the takeoff. During the ensuing period of deceleration, the airplane ground looped approximately one-quarter of a turn to the right and nosed down.

The pilot indicated that he was not aware of any preimpact mechanical anomaly with the airplane.

Aircraft

Registration
N2400S
Reported as
Piper PA-18-160
Category
Airplane
Serial number
18-7909144
Airframe hours
2,325
Engine
Lycoming O-320-B2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Public aircraft · Public use
Registered owner
State Of Alaska
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · October 4, 1994 · 48 hours before
Destination
Z41 · Anchorage, 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
28
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
270 total · 59 in this make and model · 192 as pilot in command · 37 in the last 90 days · 21 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 5 knots, gusting 8
Visibility
25 statute miles
Lowest ceiling
10,000 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.