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NTSB Report

March 15, 1984 · Cessna 401 · N777CS

Chicago, IL

Overview

Report Status

Preliminary report

Event Type

Accident

Date

March 15, 1984

Injury Outcomes

No injuries (2 uninjured)

Location

Chicago, IL

Aircraft

Cessna 401

Tail Number

N777CS

Injuries

None

Aircraft Damage

Substantial

NTSB Number

CHI84LA130

THE ACFTS LEFT MAIN GEAR COLLAPSED DURING THE LANDING ROLL. INVESTIGATION REVEALED THAT THE BOLT ON THE TOP PORTION OF THE LH BELLCRANK ASSEMBLY WAS SHEARED OFF. ONE OF THE TANGS AT THE BOTTOM OF THE BELLCRANK WAS ALSO BROKEN. WHEN EXAMINED UNDER A 10 POWER MICROSCOPE THE FRACTURED REVEALED INSTANTANEOUS OVERLOAD CHARACTERISTICS.

Full Narrative

THE ACFTS LEFT MAIN GEAR COLLAPSED DURING THE LANDING ROLL. INVESTIGATION REVEALED THAT THE BOLT ON THE TOP PORTION OF THE LH BELLCRANK ASSEMBLY WAS SHEARED OFF. ONE OF THE TANGS AT THE BOTTOM OF THE BELLCRANK WAS ALSO BROKEN. WHEN EXAMINED UNDER A 10 POWER MICROSCOPE THE FRACTURED REVEALED INSTANTANEOUS OVERLOAD CHARACTERISTICS.

Flight

Event TypeAccident

Event Time22:30 CST

Nearest AirportMIDWAY (0nm N)

Runway13R

Runway Length6519 ft

Runway Width175 ft

Flight Plan FiledIFR

Aircraft FireNo

Aircraft ExplosionNo

Aircraft

AircraftCessna 401

Tail NumberN777CS

Aircraft CategoryAir

DamageSubstantial

Operating RulePart 135

Engines2

Engine TypeReciprocating

Engine DetailsContinental · TSIO-520-E · Reciprocating · 300

Seats8

People & Injuries

Injury SummaryNo injuries (2 uninjured)

Fatal0

Serious0

Minor0

Uninjured2

Total2

Crew 1Second Class

Conditions

ConditionsIMC

LightDark Night

Wind170° @ 14 kt, gusting 19 kt

Visibility2 sm

CeilingOvercast 600 ft

Temperature / Dew Point34 C / 28 C

Altimeter30.00 inHg

Observation Time04:30

Weather SourceWFAC

500 – Data service is offline

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March 15, 1984 · Cessna 401 · N777CS

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