NYC91LA248

NTSB accident investigation · Fairchild SW3 · Atlantic City, NJ · September 29, 1991

Accident · No injuriesLimited investigationFinal report
Date
September 28, 1991, 21:17 local (Sep 29, 1991, 01:17 UTC)
Place
Atlantic City, NJ
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N159MCFairchild SW3
Weather
Visual (VMC) · Night/bright
Status
Completed · report April 27, 1993
Report
Approved by Office Director
FAA report
19910928063109A
Case key
37021

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

A failure of the down lock roller bearings of the right main landing gear, as the result of an improper modification.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Main gear collapsedLanding - flare/touchdown
Landing gear,gear locking mechanism - failure,totalCause
Maintenance,modification - improperOther maintenance personnelCause
Loss of control - on ground/waterLanding - roll
Directional control - not possiblePilot in commandFactor
Directional control - not possibleCopilot/second pilotFactor

Analysis

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.

Aircraft

Registration
N159MC
Reported as
Fairchild SW3
Category
Airplane
Serial number
728
Airframe hours
4,205
Engine
Garrett TPE33111U612G, 1,000 horsepower, turbo prop
Damage
Substantial damage
Fire
On-Ground
Flight
Instructional · Part 91
Operator
Jet Express, Inc.
Registered owner
Ccd Air Twenty Two, Inc.
Airworthiness certificate
Standard, Transport
Last inspection
AAIP · September 26, 1991 · 12 hours before
Flight plan
Company VFR
Airport
ACY · Atlantic City Itnl., runway 31, 10,000 × 180 ft, concrete

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
44
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
4,900 total · 105 in this make and model · 402 as pilot in command · 162.5 in the last 90 days · 68 in the last 30 days · 3.7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/bright
Wind
Calm
Visibility
20 statute miles
Temperature
75 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.