ANC96LA136

NTSB accident investigation · Maule M-4 · Skwentna, AK · September 3, 1996

Accident · No injuriesLimited investigationFinal report
Date
September 2, 1996, 17:00 local (Sep 3, 1996, 01:00 UTC)
Place
Skwentna, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N4726TMaule M-4
Weather
Visual (VMC) · Day
Status
Completed · report May 23, 1997
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19960902025919A
Case key
2891

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 an unsuitable landing site. A factor associated with the accident was the rough and 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
Terrain condition - rough/unevenFactor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Loss of control - on ground/waterLanding - roll
Nose overLanding - roll

Analysis

The pilot reported he was landing his airplane at a remote gravel bar. He said he touched down further down the gravel bar then he intended, and then realized there was a depression just ahead. He attempted to take off, but his hand was knocked off the throttle by the rough terrain. The airplane entered the depression, the main landing gear dug in, and the airplane nosed over.

Factual narrative

On September 2, 1996, about 1700 Alaska daylight time, a wheel equipped Maule M-4 airplane, N4726T, sustained substantial damage when it nosed over while landing on a gravel bar located approximately 50 miles west of Skwentna, Alaska. The private pilot and sole passenger aboard were not injured. The 14 CFR Part 91 flight operated in visual meteorological conditions. The flight last departed Palmer, Alaska, about 1520, and the destination was the gravel bar.

During a telephone conversation with the NTSB investigator-in-charge on September 5, the pilot reported that after touchdown on the gravel bar, he realized that he had touched down farther down the gravel bar than he wanted to. He said he tried to abort the landing, but as he reached for the throttle to increase engine power, the airplane struck something on the gravel bar. The pilot said his hand was knocked away from the throttle by the impact. The pilot was unable to maintain directional control, and the airplane entered a depression in the gravel bar. The left main landing gear wheel subsequently dug into the ground, and the airplane nosed over.

Aircraft

Registration
N4726T
Reported as
Maule M-4
Category
Airplane
Serial number
1001
Airframe hours
2,003
Engine
Continental IO-360-A, 210 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Mark A. Petersen
Registered owner
Arthur Petersen
Airworthiness certificate
Standard, Normal
Departed
PAQ · Palmer, AK

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
36
Certificate
Private
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
334 total · 139 in this make and model · 310 as pilot in command · 15 in the last 90 days · 15 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
99 statute miles
Lowest ceiling
None
Temperature
61 °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 N4726T · 2

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