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NTSB Report
January 9, 1993 · De Havilland DHC-8-311 · N433AW
Savoy, IL
Overview
Report Status
Probable Cause
Event Type
Incident
Date
January 9, 1993
Injury Outcomes
No injuries (40 uninjured)
Location
Savoy, IL
Aircraft
De Havilland DHC-8-311
Tail Number
N433AW
Operator
Air Wisconsin
Injuries
None
Aircraft Damage
Minor
NTSB Number
CHI93IA069
THE FLIGHT WAS DELAYED ON THE RUNWAY AFTER THE FLIGHT CREW EXCEEDED THE POWER NOSEWHEEL STEERING RANGE DURING A TIGHT 180 DEGREE TURN INTO POSITION. AFTER SEVERAL UNSUCCESSFUL ATTEMPTS TO STRAIGHTEN THE (CASTORING) NOSEWHEEL USING DIFFERENTIAL POWER AND BRAKES, THE CREW CALLED FOR GROUND PERSONNEL TO ASSIST. GROUND PERSONNEL REPORTED THE INBOARD WHEEL OF THE RIGHT MAIN LANDING GEAR (#3 WHEEL) APPEARED TO BE LEANING AGAINST THE STRUT. THE CO-PILOT STATED THE LANDING GEAR APPEARED NORMAL AND THE FLIGHT DEPARTED. SHORTLY AFTER LIFTOFF, THE #3 WHEEL FELL TO THE GROUND. POSTACCIDENT EXAMINATION REVEALED THE FRACTURE OF THE AXLE WAS THE RESULT OF THE DEGRADATION AND FAILURE OF THE #3 INNER WHEEL BEARING. THERE WAS EVIDENCE OF WATER CONTAMINATION IN THE WHEEL BEARING GREASE.
NTSB Probable Cause
THE TOTAL FAILURE OF THE INBOARD RIGHT MAIN LANDING GEAR WHEEL AXLE DURING THE INITIAL CLIMB.
Full Narrative
THE FLIGHT WAS DELAYED ON THE RUNWAY AFTER THE FLIGHT CREW EXCEEDED THE POWER NOSEWHEEL STEERING RANGE DURING A TIGHT 180 DEGREE TURN INTO POSITION. AFTER SEVERAL UNSUCCESSFUL ATTEMPTS TO STRAIGHTEN THE (CASTORING) NOSEWHEEL USING DIFFERENTIAL POWER AND BRAKES, THE CREW CALLED FOR GROUND PERSONNEL TO ASSIST. GROUND PERSONNEL REPORTED THE INBOARD WHEEL OF THE RIGHT MAIN LANDING GEAR (#3 WHEEL) APPEARED TO BE LEANING AGAINST THE STRUT. THE CO-PILOT STATED THE LANDING GEAR APPEARED NORMAL AND THE FLIGHT DEPARTED. SHORTLY AFTER LIFTOFF, THE #3 WHEEL FELL TO THE GROUND. POSTACCIDENT EXAMINATION REVEALED THE FRACTURE OF THE AXLE WAS THE RESULT OF THE DEGRADATION AND FAILURE OF THE #3 INNER WHEEL BEARING. THERE WAS EVIDENCE OF WATER CONTAMINATION IN THE WHEEL BEARING GREASE.
Flight
Event TypeIncident
Event Time07:19 CST
Nearest AirportU. Of I. Willard Apt (0nm N)
Runway4
Runway Length5301 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDe Havilland DHC-8-311
Tail NumberN433AW
Aircraft CategoryAir
DamageMinor
OperatorAir Wisconsin
Operating RulePart 121
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PW123 · Turboprop · 2380
Seats53
People & Injuries
Injury SummaryNo injuries (40 uninjured)
Fatal0
Serious0
Minor0
Uninjured40
Total40
Crew 1Age 42 · First Class
Conditions
ConditionsVMC
LightDawn
Wind70° @ 15 kt, gusting 25 kt
Visibility20 sm
CeilingBroken clouds 6500 ft
Temperature / Dew Point27 C / 21 C
Altimeter30.00 inHg
Observation Time12:45
Weather SourceWFAC