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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

September 29, 1991 · Fairchild SW3 · N159MC

Atlantic City, NJ

Overview

Report Status
Probable Cause
Event Type
Accident
Date
September 29, 1991
Injury Outcomes
No injuries (3 uninjured)
Location
Atlantic City, NJ
Aircraft
Fairchild SW3
Tail Number
N159MC
Operator
Jet Express
Injuries
None
Aircraft Damage
Substantial
NTSB Number
NYC91LA248

THE AIRPLANE TOUCHED DOWN ON RUNWAY 31. UPON TOUCHDOWN, THE RIGHT MAIN LANDING GEAR COLLAPSED AND THE AIRPLANE VEERED OFF THE RIGHT SIDE OF THE RUNWAY. THE AIRPLANE HAD RECENTLY UNDERGONE A MODIFICATION TO INCREASE ITS GROSS OPERATING WEIGHT FROM 14,500 TO 16,000 POUNDS. IT WAS FOUND THAT BOTH ACTUATOR POSITIONING CAMS HAD BEEN GROUND DOWN AT THE DOWN LOCK LOBES. REMOVAL OF MATERIAL FROM THE CAMS IS NOT AUTHORIZED ON THIS AIRPLANE. BOTH RIGHT MAIN LANDING GEAR DOWN LOCK ROLLER BEARING OUTER RACES HAD FAILED. THE FAA FOUND ONE BEARING IN PIECES ON THE RUNWAY, AND THE OTHER WAS NOT RECOVERED.

NTSB Probable Cause

A FAILURE OF THE DOWN LOCK ROLLER BEARINGS OF THE RIGHT MAIN LANDING GEAR, AS THE RESULT OF AN IMPROPER MODIFICATION.

Full Narrative

THE AIRPLANE TOUCHED DOWN ON RUNWAY 31. UPON TOUCHDOWN, THE RIGHT MAIN LANDING GEAR COLLAPSED AND THE AIRPLANE VEERED OFF THE RIGHT SIDE OF THE RUNWAY. THE AIRPLANE HAD RECENTLY UNDERGONE A MODIFICATION TO INCREASE ITS GROSS OPERATING WEIGHT FROM 14,500 TO 16,000 POUNDS. IT WAS FOUND THAT BOTH ACTUATOR POSITIONING CAMS HAD BEEN GROUND DOWN AT THE DOWN LOCK LOBES. REMOVAL OF MATERIAL FROM THE CAMS IS NOT AUTHORIZED ON THIS AIRPLANE. BOTH RIGHT MAIN LANDING GEAR DOWN LOCK ROLLER BEARING OUTER RACES HAD FAILED. THE FAA FOUND ONE BEARING IN PIECES ON THE RUNWAY, AND THE OTHER WAS NOT RECOVERED.

Flight

Event TypeAccident
Event Time21:17 EDT
Nearest AirportAtlantic City Itnl. (0nm)
Runway31
Runway Length10000 ft
Runway Width180 ft
Flight Plan FiledCvfr
Aircraft FireGrd
Aircraft ExplosionNo

Aircraft

AircraftFairchild SW3
Tail NumberN159MC
Aircraft CategoryAir
DamageSubstantial
OperatorJet Express
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE33111U612G · Turboprop · 1000
Seats21

People & Injuries

Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 44 · First Class

Conditions

ConditionsVMC
LightBright Night
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO

External Links

Appendix: Source Data