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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

October 6, 1987 · Mooney M-20E · N1936Y

Columbia, SC

Overview

Report Status

Preliminary report

Event Type

Incident

Date

October 6, 1987

Injury Outcomes

No injuries (2 uninjured)

Location

Columbia, SC

Aircraft

Mooney M-20E

Tail Number

N1936Y

Operator

Walter Wilder Jr

Injuries

None

Aircraft Damage

Minor

NTSB Number

ATL88IA074

DURING TAKEOFF THE PROPELLER STUDS FAILED AND THE PROPELLER DEPARTED THE ACFT. FAA INCIDENT RPT STATED THAT PROPELLER HAD BEEN OVERHAULED AND REPLACED 32 HOURS PRIOR TO THE SEPARATION. METALLURGICAL EXAM OF THE PROPELLER STUDS REVEALED FATIGUE FAILURE OF THE STUDS THROUGH THE THREADED AREA WITH NO DAMAGE TO THE THREADS. FATIGUE FAILURE OF PROP STUDS OCCURRED AS A RESULT OF VIBRATION DUE TO INADEQUATE TORQUING OF THE MOUNTING NUTS.

Full Narrative

DURING TAKEOFF THE PROPELLER STUDS FAILED AND THE PROPELLER DEPARTED THE ACFT. FAA INCIDENT RPT STATED THAT PROPELLER HAD BEEN OVERHAULED AND REPLACED 32 HOURS PRIOR TO THE SEPARATION. METALLURGICAL EXAM OF THE PROPELLER STUDS REVEALED FATIGUE FAILURE OF THE STUDS THROUGH THE THREADED AREA WITH NO DAMAGE TO THE THREADS. FATIGUE FAILURE OF PROP STUDS OCCURRED AS A RESULT OF VIBRATION DUE TO INADEQUATE TORQUING OF THE MOUNTING NUTS.

Flight

Event TypeIncident

Event Time21:04 EDT

Nearest AirportColumbia Metro (0nm N)

Runway29

Runway Length8602 ft

Runway Width150 ft

Flight Plan FiledNone

Aircraft FireNo

Aircraft ExplosionNo

Aircraft

AircraftMooney M-20E

Tail NumberN1936Y

Aircraft CategoryAir

DamageMinor

OperatorWalter Wilder Jr

Operating RulePart 91

Engines1

Engine TypeReciprocating

Engine DetailsLycoming · IO-360-A1A · Reciprocating · 200

Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)

Fatal0

Serious0

Minor0

Uninjured2

Total2

Crew 1Age 54 · None

Conditions

ConditionsVMC

LightDaylight

Wind190° @ 3 kt

Visibility15 sm

CeilingNone

Temperature / Dew Point61 F / 0 C

Altimeter29.00 inHg

Observation Time01:00

Weather SourceWFAC

500 – Data service is offline

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October 6, 1987 · Mooney M-20E · N1936Y

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