ANC89LA087

NTSB accident investigation · Piper PA-18-100 · Knik River, AK · June 10, 1989

Accident · No injuriesLimited investigationFinal report
Date
June 10, 1989, 12:10 local (20:10 UTC)
Place
Knik River, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N7291KPiper PA-18-100
Weather
Visual (VMC) · Day
Status
Completed · report August 22, 1990
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19890610015149A
Case key
5196

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 failure of the pilot-in-command to maintain control of the airplane on the ground by proper use of the flight controls during gusting winds.

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/waterTaxi - to takeoff
Weather condition - high windCause
Aircraft control - not maintainedPilot in commandCause
Weather condition - gustsCause
Flight controls - improper use ofPilot in commandCause
Nose overTaxi - to takeoff

Analysis

The pilot-in-command reported that during backtaxi for takeoff a gust of wind raised the tail and nosed the airplane over onto its back.

Aircraft

Registration
N7291K
Reported as
Piper PA-18-100
Category
Airplane
Serial number
18203
Engine
Continental O-200-A, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Robert Castle
Registered owner
George Pappas
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 19, 1989
Departed
MRI · Anchorage, 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
31
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Flight hours
706 total · 341 in this make and model · 626 as pilot in command · 1 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 15 knots, gusting 20
Visibility
15 statute miles
Lowest ceiling
500 ft broken
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.