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NTSB Report
November 26, 1990 · Atr ATR-42-300 · N971NA
St. Thomas
Overview
Report Status
Probable Cause
Event Type
Incident
Date
November 26, 1990
Injury Outcomes
No injuries (47 uninjured)
Location
St. Thomas
Aircraft
Atr ATR-42-300
Tail Number
N971NA
Operator
Executive Air Charter
Injuries
None
Aircraft Damage
Minor
NTSB Number
MIA91IA032
LEFT MAIN LANDING GEAR COLLAPSED DURING TAXI FROM LANDING. LEFT MAIN LANDING GEAR SIDE BRACE LOWER ARM HAD SEPARATED DUE TO FATIGUE IN THE AREA WHERE A BEARING IS MOUNTED. THE FATIGUE CRACK ORIGINATED IN AN AREA OF CORROSION DAMAGE ON THE LOWER ARM OUTSIDE OF THE BEARING RACE.
NTSB Probable Cause
THE FAILURE OF THE LEFT MAIN LANDING GEAR SIDE BRACE LOWER ARM DUE TO FATIGUE RESULTING FROM CORROSION FORMATION, WHICH RESULTED FROM IMPROPER DESIGN TO PREVENT CORROSION FORMATION.
Full Narrative
LEFT MAIN LANDING GEAR COLLAPSED DURING TAXI FROM LANDING. LEFT MAIN LANDING GEAR SIDE BRACE LOWER ARM HAD SEPARATED DUE TO FATIGUE IN THE AREA WHERE A BEARING IS MOUNTED. THE FATIGUE CRACK ORIGINATED IN AN AREA OF CORROSION DAMAGE ON THE LOWER ARM OUTSIDE OF THE BEARING RACE.
Flight
Event TypeIncident
Event Time11:06 UTC
Nearest AirportCyrile E. King (0nm N)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAtr ATR-42-300
Tail NumberN971NA
Aircraft CategoryAir
DamageMinor
OperatorExecutive Air Charter
Operating RulePart 121
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PW-120 · Turboprop · 2100
Seats47
People & Injuries
Injury SummaryNo injuries (47 uninjured)
Fatal0
Serious0
Minor0
Uninjured47
Total47
Crew 1Age 38 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind60° @ 12 kt
Visibility20 sm
CeilingNone
Altimeter30.00 inHg
Observation Time11:06
Weather SourceWFAC