ANC93LA171

NTSB accident investigation · Piper PA-12 · Ptarmigan Pass, AK · September 6, 1993

Accident · FatalLimited investigationFinal report
Date
September 5, 1993, 17:04 local (Sep 6, 1993, 01:04 UTC)
Place
Ptarmigan Pass, AK
Injuries
1 fatal; on the ground: 1 fatal
Damage
No damage
Phase of flight
Standing
Aircraft
N3629MPiper PA-12
Weather
Visual (VMC) · Dusk
Status
Completed · report December 2, 1994
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19930905033619A
Case key
2425

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 inadvertently walked into a turning propeller. Factors in the accident were the soft runway which mired the airplane and the pilot's diverted attention during the attempt to free the airplane.

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.

Propeller/rotor contact to personStanding - engine(s) operating
Airport facilities,runway/landing area condition - softFactor
Aircraft unattended/engine(s) running - intentionalPilot in commandCause
Diverted attentionPilot in commandFactor

Analysis

The airplane was taxiing for takeoff from remote dirt strip and became mired in mud. The pilot deplaned, leaving the engine running unattended and lifted the tail wheel free. With attention diverted by work to free the airplane, the pilot walked into the propeller arc and received fatal injuries.

Factual narrative

On September 5, 1993, at approximately 2200, Alaska daylight time, a hunter pilot on a muddy remote landing strip was struck by a turning propeller on his wheel-equipped Piper PA-12 airplane, N3629M. Visual meteorological conditions were reported in the area, but no witnesses were known to have seen the accident. The pilot had boarded the airplane for the purpose of takeoff, but had left the airplane momentarily to lift the airplane's tailwheel from the mud, and during return to the cockpit, walked into the propeller arc. The flight was being conducted under 14 CFR Part 91 for personal reasons at the time. The private pilot was found the following day to have suffered fatal injuries and the airplane was not damaged.

Alaska State Troopers from the Troopers and Fish & Wildlife Protection conducted the investigation on behalf of the NTSB. Footprints found at the scene indicated the activity of the pilot surrounding the airplane stuck in the mud. Interviews of the pilot's companions revealed that the pilot had landed at the remote strip en route to base camp when his airplane became low on fuel. A second airplane landed and delivered fuel and departed the short strip. While overhead, the second airplane's pilot received a radio transmission indicating that N3629M had become stuck in the mud at the end of the strip and the pilot intended to get out and pull it free. That was the last transmission heard from the accident pilot.

On the following day, companions found the pilot deceased and lying under the airplane's propeller. Upon examination they found the airplane's magneto switches still in the "on" position and the fuel selector on "both".

Aircraft

Registration
N3629M
Reported as
Piper PA-12
Category
Airplane
Serial number
12-2476
Engine
Lycoming O-235, 115 horsepower, reciprocating
Damage
No damage
Flight
Personal · Part 91
Operator
Plante, Henry
Registered owner
Henry Plante
Airworthiness certificate
Standard, Normal
Airport
Unnamed Airstrip

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
51
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Unknown

Weather

Conditions
Visual (VMC) · Dusk

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.