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NTSB Report
February 5, 2008 · Swearingen SA-226AT · N120SC
Ankeny, IA
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
February 5, 2008
Injury Outcomes
No injuries (1 uninjured)
Location
Ankeny, IA
Aircraft
Swearingen SA-226AT
Tail Number
N120SC
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI08CA074
The pilot reported that it was snowing during his preflight activities and takeoff roll. A snowplow operator stated that he had cleared approximately four passes on either side of the runway centerline when the accident airplane taxied onto the runway. The pilot back-taxied on the departure runway to determine how much snow covered the runway. During the subsequent takeoff roll, at approximately 80 knots, the left main landing gear encountered some deeper snow that caused the airplane to swerve left off of the runway centerline. The pilot attempted to correct the left swerve with right rudder input, but the airplane continued off the left side of the runway. The airplane was substantially damaged when its nose landing gear impacted a snowbank.
NTSB Probable Cause
The pilot's failure to maintain directional control during the takeoff roll. Contributing to the accident was the snow on the runway and the snowbank.
Full Narrative
The pilot reported that it was snowing during his preflight activities and takeoff roll. A snowplow operator stated that he had cleared approximately four passes on either side of the runway centerline when the accident airplane taxied onto the runway. The pilot back-taxied on the departure runway to determine how much snow covered the runway. During the subsequent takeoff roll, at approximately 80 knots, the left main landing gear encountered some deeper snow that caused the airplane to swerve left off of the runway centerline. The pilot attempted to correct the left swerve with right rudder input, but the airplane continued off the left side of the runway. The airplane was substantially damaged when its nose landing gear impacted a snowbank.
Flight
Event TypeAccident
Event Time13:20 CST
Nearest AirportAnkeny Regional Airport (0nm)
Runway36
Runway Length5500 ft
Runway Width100 ft
Flight Plan FiledIFR
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSwearingen SA-226AT
Tail NumberN120SC
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsHoneywell · TPE-331-10UA · Turboprop · 840 | Honeywell · TPE-331-10UA · Turboprop
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 54 · Second Class · None
Conditions
ConditionsIMC
LightDaylight
Wind30° @ 7 kt
Visibility0.8 sm
CeilingOvercast 500 ft
Temperature / Dew Point30 C / 28 C
Altimeter29.90 inHg
Observation Time19:15
Weather SourceWFAC