ANC84LA178

NTSB accident investigation · Piper PA-11 · Tasnuna Valley, AK · September 13, 1984

Accident · Serious injuriesLimited investigationFinal report
Date
September 13, 1984, 06:00 local (14:00 UTC)
Place
Tasnuna Valley, AK
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N4801MPiper PA-11
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19840913051029A
Case key
4372

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

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 - in flightManeuvering
Aircraft handling - improperPilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The plt stated that they had just taken off from a gravel bar when they spotted a moose. He circled the moose in a left orbit at about 65 miles per hour. During one of the orbits the 'right wing fell in a downward direction and the nose of the acft pitched down and the airplane fell to the ground.'

Aircraft

Registration
N4801M
Reported as
Piper PA-11
Category
Airplane
Serial number
11314
Airframe hours
1,164
Engine
Lycoming O-235-C1, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert Pierson
Airworthiness certificate
Standard, Normal
Departed
VDZ · Valdez, 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
37
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,124 total · 1,124 in this make and model · 1,124 as pilot in command · 250 in the last 90 days · 150 in the last 30 days · 9 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
None
Temperature
43 °F, dew point -0 °F
Altimeter
29.00 inHg

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 N4801M · 1

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