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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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November 11, 1989 · Beech 95 · N17AT

Floydada, TX

Overview

Report Status
Probable Cause
Event Type
Accident
Date
November 11, 1989
Injury Outcomes
No injuries (4 uninjured)
Location
Floydada, TX
Aircraft
Beech 95
Tail Number
N17AT
Operator
B & H Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW90LA025

WHILE THE AIRPLANE WAS AT CRUISE, THE RIGHT PROPELLER SPINNER FELL OFF. THREE OR FOUR MINUTES LATER, THE RIGHT PROPELLER CAME OFF AND CUT INTO THE NOSE OF THE AIRPLANE. WITH NO ELECTRICAL POWER, AND DETERIORATED AIRPLANE CONTROL, THE PILOT MADE A WHEELS-UP LANDING ON THE DESTINATION AIRPORT. THE RIGHT PROPELLER AND THE CENTER OF THE STARTER RING WERE NOT RECOVERED. FIVE OF THE PROPELLER ATTACHMENT BOLTS REMAINED IN THE ENGINE CRANKSHAFT FLANGE. LABORATORY VISUAL INSPECTION INDICATED FOUR OF THESE BOLTS FAILED FROM FATIGUE AND THE FIFTH FAILED FROM OVERLOAD.

NTSB Probable Cause

FAILURE OF THE PROPELLER ATTACHMENT BOLTS DUE TO FATIGUE IN FOUR OF THE BOLTS AND OVERLOAD IN ANOTHER. A CONTRIBUTING FACTOR WAS THE LOSS OF ELECTRICAL POWER AND THE DETERIORATED AIRPLANE CONTROL/PREFORMANCE.

Full Narrative

WHILE THE AIRPLANE WAS AT CRUISE, THE RIGHT PROPELLER SPINNER FELL OFF. THREE OR FOUR MINUTES LATER, THE RIGHT PROPELLER CAME OFF AND CUT INTO THE NOSE OF THE AIRPLANE. WITH NO ELECTRICAL POWER, AND DETERIORATED AIRPLANE CONTROL, THE PILOT MADE A WHEELS-UP LANDING ON THE DESTINATION AIRPORT. THE RIGHT PROPELLER AND THE CENTER OF THE STARTER RING WERE NOT RECOVERED. FIVE OF THE PROPELLER ATTACHMENT BOLTS REMAINED IN THE ENGINE CRANKSHAFT FLANGE. LABORATORY VISUAL INSPECTION INDICATED FOUR OF THESE BOLTS FAILED FROM FATIGUE AND THE FIFTH FAILED FROM OVERLOAD.

Flight

Event TypeAccident
Event Time18:00 CST
Nearest AirportFloydada Municipal (0nm N)
Runway17
Runway Length3700 ft
Runway Width50 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBeech 95
Tail NumberN17AT
Aircraft CategoryAir
DamageSubstantial
OperatorB & H Aviation
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A1A · Reciprocating · 180
Seats4

People & Injuries

Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 31 · Second Class

Conditions

ConditionsVMC
LightBright Night
Wind170° @ 7 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point61 F / 16 C
Altimeter30.00 inHg
Weather SourcePILO

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Appendix: Source Data