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NTSB Report
December 31, 1990 · Swearingen SA-227 · N385PH
Kalispell, MT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 31, 1990
Injury Outcomes
No injuries (15 uninjured)
Location
Kalispell, MT
Aircraft
Swearingen SA-227
Tail Number
N385PH
Operator
Horizon Airlines
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA91LA040
THE CREW OF THE SA-227 COMMUTER AIRLINER LOST DIRCTIONAL CONTROL AFTER LANDING IN SNOW THAT WAS REPORTEDLY BETWEEN FIVE AND TEN INCHES DEEP. THE CREW HAD REQUESTED A SNOW-DEPTH REPORT, WHICH WAS RELAYED TO THEM BY AN AIRPORT SNOWPLOW OPERATOR, THROUGH THE AIRLINE'S OPERATIONS PERSONNEL. THE SNOW DEPTH HAD BEEN REPORTED AS ONE INCH AT THAT TIME. THE AIRCRAFT DRIFTED OFF THE RIGHT SIDE OF THE RUNWAY, CAUSING SUBSTANTIAL DAMAGE TO THE FUSELAGE.
NTSB Probable Cause
THE FLIGHT CREW'S INABLITY TO MAINTAIN DIRECTIONAL CONTROL AFTER LANDING IN SNOW-DEPTH CONDITIONS THAT HAD BEEN ERRONEOUSLY REPORTED AS BEING WITHIN OPERATING LIMITATIONS.
Full Narrative
THE CREW OF THE SA-227 COMMUTER AIRLINER LOST DIRCTIONAL CONTROL AFTER LANDING IN SNOW THAT WAS REPORTEDLY BETWEEN FIVE AND TEN INCHES DEEP. THE CREW HAD REQUESTED A SNOW-DEPTH REPORT, WHICH WAS RELAYED TO THEM BY AN AIRPORT SNOWPLOW OPERATOR, THROUGH THE AIRLINE'S OPERATIONS PERSONNEL. THE SNOW DEPTH HAD BEEN REPORTED AS ONE INCH AT THAT TIME. THE AIRCRAFT DRIFTED OFF THE RIGHT SIDE OF THE RUNWAY, CAUSING SUBSTANTIAL DAMAGE TO THE FUSELAGE.
Flight
Event TypeAccident
Event Time10:30 MST
Nearest AirportGlacier Int'L (0nm N)
Runway2
Runway Length8000 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSwearingen SA-227
Tail NumberN385PH
Aircraft CategoryAir
DamageSubstantial
OperatorHorizon Airlines
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE-331-11U · Turboprop · 1000
Seats21
People & Injuries
Injury SummaryNo injuries (15 uninjured)
Fatal0
Serious0
Minor0
Uninjured15
Total15
Crew 1Age 40 · First Class
Conditions
ConditionsIMC
LightDaylight
Wind230° @ 5 kt
Visibility1 sm
Ceiling600 ft
Temperature / Dew Point18 C / 16 C
Altimeter29.00 inHg
Observation Time17:50
Weather SourceWFAC