ANC90LA036

NTSB accident investigation · Piper PA-12 · Nome, AK · March 5, 1990

Accident · No injuriesLimited investigationFinal report
Date
March 5, 1990, 12:00 local (16:00 UTC)
Place
Nome, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N7853HPiper PA-12
Weather
Visual (VMC) · Day
Status
Completed · report September 5, 1991
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Case key
5340

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

On this page

Probable cause

The failure of the left gear axle due to corrosion and fatigue.

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.

Airframe/component/system failure/malfunctionTakeoff
Landing gear,ski assembly - corrodedCause
Landing gear,axle - fatigueCause
Loss of control - on ground/waterTakeoff
Directional control - not possible
Ground loop/swerve - uncontrolled

Analysis

During the takeoff run, the left main ski axle failed & the acft ground looped to the left & was damaged. An exam revealed the axle had failed from fatigue in an area of corrosion.

Aircraft

Registration
N7853H
Reported as
Piper PA-12
Category
Airplane
Serial number
12754
Airframe hours
3,384
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Public aircraft · Part 91
Operator
Steven Machide, doing business as Alaska Dept. Fish And Game
Registered owner
Alaska Dept. Fish & Game
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 30, 1989 · 59 hours before
Airport
OME · Nome, runway 2, 5,776 × 150 ft, asphalt

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
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
773 total · 340 in this make and model · 689 as pilot in command · 14 in the last 90 days · 11 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 2 knots
Visibility
5 statute miles
Lowest ceiling
None
Temperature
14 °F, dew point 19 °F
Altimeter
30.00 inHg
Observed at
OME, 1 nm away

Other investigations on N7853H · 2

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