SEA90LA037

NTSB accident investigation · Swearingen SA226TC · Coeur D'Alene, ID · January 31, 1990

Accident · No injuriesLimited investigationFinal report
Date
January 30, 1990, 19:15 local (Jan 31, 1990, 03:15 UTC)
Place
Coeur D'Alene, ID
Injuries
21 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N56EASwearingen SA226TC
Weather
Instrument (IMC) · Night/dark
Status
Completed · report September 30, 1991
Report
Approved by Office Director
FAA report
19900130001479A
Case key
41164

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The loss of the flight crew's visual perception, due to an unforeseen whiteout condition. A related factor was the snowbank.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherLanding - flare/touchdown
Light condition - dark nightFactor
Weather condition - snowFactor
Weather condition - whiteoutCause
Proper alignment - not possible
Visual/aural perceptionCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - snowbankFactor

Analysis

The pilot reported that after reaching the airport, IMC prevailed and light snow was falling. At the decision height, the approach lights and the runway lights were in sight. The runway was covered with snow. During the flare to land, the pilot lost depth perception and runway alignment from blowing snow. The airplane touched down and the pilot believedthe plane was slightly left of the centerline. He corrected with right rudder; however, the airplane continued to travel left. Subsequently, it went off the runway and came to rest in a snowbank with damage.

Aircraft

Registration
N56EA
Reported as
Swearingen SA226TC
Category
Airplane
Serial number
TC399
Airframe hours
9,753
Engine
Garrett TPE-331, 840 horsepower, turbo prop
Damage
Substantial damage
Flight
Part 135
Operator
Empire Airlines
Registered owner
Unknown
Last inspection
Continuous airworthiness · January 18, 1990 · 57 hours before
Departed
SEA · Seattle, WA
Flight plan
IFR
Airport
COE · Coeur D'Alene, runway 5, 7,400 × 140 ft, snow

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
34
Certificates
Airline transport, Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
6,030 total · 1,847 in this make and model · 5,660 as pilot in command · 53 in the last 90 days · 31 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
140° at 5 knots
Visibility
2 statute miles
Temperature
30 °F, dew point 30 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.