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NTSB Report
June 21, 1989 · Beauchesne/Wells Glasair TD · N544BM
Moriarity, NM
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 21, 1989
Injury Outcomes
No injuries (1 uninjured)
Location
Moriarity, NM
Aircraft
Beauchesne/Wells Glasair TD
Tail Number
N544BM
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN89LA144
THE PLT RPRTD THAT DRG FLT, THE PROP BEGAN TO WOBBLE & SHOOK THE ACFT VIOLENTLY. HE TURNED THE ACFT AWAY FROM MTNS TO FIND A SUITABLE AREA FOR AN EMERGENCY LANDING. HOWEVER, AT AN ALT OF ABOUT 400' AGL, THE PROP SEPD & THE PLT WAS FORCED TO LAND ON DESERT TERRAIN. DRG THE LANDING, THE ACFT WAS SUBSTANTIALLY DAMAGED. AN INVESTIGATION REVEALED THE PROP HAD BEEN MOUNTED ON THE ENG WITH AN EXTENSION, BUT THE EXTENSION DID NOT HAVE A MEANS TO PRECISELY CENTER THE PROP. SUBSEQUENTLY, THE PROP BEGAN A SEVERE VIBRATION, THE PROP MOUNTING BOLTS FAILED & THE PROP SEPD FROM THE ACFT.
NTSB Probable Cause
IMPROPER INSTALLATION OF THE PROPELLER WHICH RESULTED IN SEVERE VIBRATION AND FAILURE OF THE PROPELLER MOUNTING BOLTS, & THE SEPARATION OF THE PROPELLER FROM THE AIRCRAFT. ROUGH/UNEVEN DESERT TERRAIN CONTRIBUTED TO THE ACCIDENT.
Full Narrative
THE PLT RPRTD THAT DRG FLT, THE PROP BEGAN TO WOBBLE & SHOOK THE ACFT VIOLENTLY. HE TURNED THE ACFT AWAY FROM MTNS TO FIND A SUITABLE AREA FOR AN EMERGENCY LANDING. HOWEVER, AT AN ALT OF ABOUT 400' AGL, THE PROP SEPD & THE PLT WAS FORCED TO LAND ON DESERT TERRAIN. DRG THE LANDING, THE ACFT WAS SUBSTANTIALLY DAMAGED. AN INVESTIGATION REVEALED THE PROP HAD BEEN MOUNTED ON THE ENG WITH AN EXTENSION, BUT THE EXTENSION DID NOT HAVE A MEANS TO PRECISELY CENTER THE PROP. SUBSEQUENTLY, THE PROP BEGAN A SEVERE VIBRATION, THE PROP MOUNTING BOLTS FAILED & THE PROP SEPD FROM THE ACFT.
Flight
Event TypeAccident
Event Time17:00 MDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeauchesne/Wells Glasair TD
Tail NumberN544BM
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360 · Reciprocating · 190
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 43 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point10 C / 0 C
Altimeter0
Weather SourcePILO