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NTSB Report
May 23, 1990 · Fairchild SA227 · N27442
Olympia, WA
Overview
Report Status
Probable Cause
Event Type
Incident
Date
May 23, 1990
Injury Outcomes
1 injury (1 minor injury), 19 uninjured
Location
Olympia, WA
Aircraft
Fairchild SA227
Tail Number
N27442
Operator
Horizon Airlines
Injuries
Minor
Aircraft Damage
Minor
NTSB Number
SEA90IA085
WHILE DESCENDING FROM 14,000 FEET, THE SECOND ROW RIGHT SIDE CABIN WINDOW SUDDENLY BLEW OUT. AN EMERGENCY DESCENT WAS INITIATED TO THE AIRPORT WHERE THE AIRPLANE LANDED WITHOUT FURTHER INCIDENT. THE WINDOW AND FRAME WERE INSPECTED AND NOTED THAT THE FRAME AND CONNECTING BOLTS APPEARED UNDAMAGED. TWO INDENTATIONS WERE NOTED ON THE FUSELAGE JUST FORWARD OF THE WINDOW AND AFT OF THE ICE PROTECTION PLATE. PASSENGERS REPORTED THAT PRIOR TO THE WINDOW BLOW OUT, LOUD BUMPS OR THUMPS WERE HEARD.
NTSB Probable Cause
DUE TO AN ICE BUILD-UP DEPARTING THE PROPELLER AND STRIKING THE CABIN WINDOW.
Full Narrative
WHILE DESCENDING FROM 14,000 FEET, THE SECOND ROW RIGHT SIDE CABIN WINDOW SUDDENLY BLEW OUT. AN EMERGENCY DESCENT WAS INITIATED TO THE AIRPORT WHERE THE AIRPLANE LANDED WITHOUT FURTHER INCIDENT. THE WINDOW AND FRAME WERE INSPECTED AND NOTED THAT THE FRAME AND CONNECTING BOLTS APPEARED UNDAMAGED. TWO INDENTATIONS WERE NOTED ON THE FUSELAGE JUST FORWARD OF THE WINDOW AND AFT OF THE ICE PROTECTION PLATE. PASSENGERS REPORTED THAT PRIOR TO THE WINDOW BLOW OUT, LOUD BUMPS OR THUMPS WERE HEARD.
Flight
Event TypeIncident
Event Time08:30 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftFairchild SA227
Tail NumberN27442
Aircraft CategoryAir
DamageMinor
OperatorHorizon Airlines
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE311 · Turboprop · 1591
Seats20
People & Injuries
Injury Summary1 injury (1 minor injury), 19 uninjured
Fatal0
Serious0
Minor1
Uninjured19
Total20
Crew 1Age 46 · First Class
Conditions
ConditionsUnknown
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO