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NTSB Report
January 17, 1990 · Cessna 402A · N4532Q
Mosinee, WI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 17, 1990
Injury Outcomes
1 injury (1 serious injury)
Location
Mosinee, WI
Aircraft
Cessna 402A
Tail Number
N4532Q
Operator
Freight Runners Express
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
CHI90FA066
THE ON-DEMAND AIR TAXI AIRPLANE COLLIDED WITH TREES AND TERRAIN DURING A THIRD ATTEMPT AT AN ILS APPROACH. THE AIRPLANE CRASHED APPROXIMATELY TWO MILES BEYOND THE AIRPORT ON THE EXTENDED CENTERLINE OF THE LANDING RUNWAY. IN AN INTERVIEW THE PILOT RELATED THAT ON HIS FIRST APPROACH TO THE AIRPORT HE SAW THE RUNWAY AND OBSERVED VEHICLES ON THE TAXIWAY AS HE PERFORMED HIS MISSED APPROACH. WHEN HE WAS ASKED THE REASON FOR THE SECOND MISSED APPROACH HE SAID IT WAS BECAUSE OF INSTRUMENT FLUCTUATIONS ON HIS COURSE DIRECTION INDICATOR. DURING THIS PERIOD HE ASKED THAT THE LIGHTS BE SET TO HIGH INTENSITY BECAUSE HE COULD NOT SEE THEM. THE LIGHTS WERE VERIFIED AS BEING SET FOR HIGH INTENSITY. HE DID NOT REMEMBER ANYTHING OF THE THIRD APPROACH AFTER HE PASSED THE OUTER MARKER. SNOW REMOVAL OPERATIONS WERE IN PROGRESS DURING THE PERIOD THE ACCIDENT AIRPLANE WAS MAKING APPROACHES TO THE AIRPORT.
NTSB Probable Cause
THE PILOT DISREGARDING THE PUBLISHED DECISION HEIGHT AND NOT PERFORMING A MISSED APPROACH.
Full Narrative
THE ON-DEMAND AIR TAXI AIRPLANE COLLIDED WITH TREES AND TERRAIN DURING A THIRD ATTEMPT AT AN ILS APPROACH. THE AIRPLANE CRASHED APPROXIMATELY TWO MILES BEYOND THE AIRPORT ON THE EXTENDED CENTERLINE OF THE LANDING RUNWAY. IN AN INTERVIEW THE PILOT RELATED THAT ON HIS FIRST APPROACH TO THE AIRPORT HE SAW THE RUNWAY AND OBSERVED VEHICLES ON THE TAXIWAY AS HE PERFORMED HIS MISSED APPROACH. WHEN HE WAS ASKED THE REASON FOR THE SECOND MISSED APPROACH HE SAID IT WAS BECAUSE OF INSTRUMENT FLUCTUATIONS ON HIS COURSE DIRECTION INDICATOR. DURING THIS PERIOD HE ASKED THAT THE LIGHTS BE SET TO HIGH INTENSITY BECAUSE HE COULD NOT SEE THEM. THE LIGHTS WERE VERIFIED AS BEING SET FOR HIGH INTENSITY. HE DID NOT REMEMBER ANYTHING OF THE THIRD APPROACH AFTER HE PASSED THE OUTER MARKER. SNOW REMOVAL OPERATIONS WERE IN PROGRESS DURING THE PERIOD THE ACCIDENT AIRPLANE WAS MAKING APPROACHES TO THE AIRPORT.
Flight
Event TypeAccident
Event Time22:45 CST
Nearest AirportCentral Wisconsin (0nm N)
Runway8
Runway Length7645 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftCessna 402A
Tail NumberN4532Q
Aircraft CategoryAir
DamageDestroyed
OperatorFreight Runners Express
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-E · Reciprocating · 300
Seats2
People & Injuries
Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 28 · First Class
Conditions
ConditionsIMC
LightDark Night
Wind130° @ 6 kt
Visibility1 sm
Ceiling300 ft
Temperature / Dew Point30 C / 23 C
Altimeter0
Observation Time04:45
Weather SourceWFAC