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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

August 12, 1992 · Piper J-3 · N87945

Portsmouth, OH

Overview

Report Status
Probable Cause
Event Type
Accident
Date
August 12, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Portsmouth, OH
Aircraft
Piper J-3
Tail Number
N87945
Operator
Kyle W Knore
Injuries
None
Aircraft Damage
Substantial
NTSB Number
NYC92LA163

THE PILOT SAID, 'WE WERE AT 2500 FEET MEAN SEA LEVEL. ALL OF A SUDDEN WE STARTED EXPERIENCING A VERY VIOLENT VIBRATION....IT WAS VIBRATING SO BADLY I WAS AFRAID IT WAS GOING TO SHAKE THE ENGINE OFF THE AIRPLANE....I SHUT THE ENGINE OFF.' HE MADE A FORCED LANDING IN A FIELD WITH HIGH VEGITATION. THE FAA REPORT SAID, '...THE ENGINE VIBRATION WAS DUE TO WOOD PROPELLER DELAMINATION OVER ONE BLADE LEADING EDGE AND TIP. TRACES OF RUST WERE FOUND ON THE WOOD WHERE THE METAL INLAY WAS ATTACHED WITH STEEL SCREWS TO THE WOOD.' THE PROPELLER MANUFACTURER CONFIRMED THAT STEEL SCREWS ARE USED TO SECURE THE LEADING EDGE TO THE WOOD BLADE.

NTSB Probable Cause

THE FAILURE OF THE PROPELLER LEADING EDGE AS THE RESULT OF CORROSION AND THE SUBSEQUENT FORCED LANDING ON UNSUITABLE TERRAIN.

Full Narrative

THE PILOT SAID, 'WE WERE AT 2500 FEET MEAN SEA LEVEL. ALL OF A SUDDEN WE STARTED EXPERIENCING A VERY VIOLENT VIBRATION....IT WAS VIBRATING SO BADLY I WAS AFRAID IT WAS GOING TO SHAKE THE ENGINE OFF THE AIRPLANE....I SHUT THE ENGINE OFF.' HE MADE A FORCED LANDING IN A FIELD WITH HIGH VEGITATION. THE FAA REPORT SAID, '...THE ENGINE VIBRATION WAS DUE TO WOOD PROPELLER DELAMINATION OVER ONE BLADE LEADING EDGE AND TIP. TRACES OF RUST WERE FOUND ON THE WOOD WHERE THE METAL INLAY WAS ATTACHED WITH STEEL SCREWS TO THE WOOD.' THE PROPELLER MANUFACTURER CONFIRMED THAT STEEL SCREWS ARE USED TO SECURE THE LEADING EDGE TO THE WOOD BLADE.

Flight

Event TypeAccident
Event Time10:30 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper J-3
Tail NumberN87945
Aircraft CategoryAir
DamageSubstantial
OperatorKyle W Knore
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · A-65-8 · Reciprocating · 65
Seats2

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 47 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind180° @ 2 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO

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Appendix: Source Data