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NTSB Report
August 19, 1989 · Fokker F-28 MK4000 F-28 MK400 · N489US
Vero Beach, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 19, 1989
Injury Outcomes
1 injury (1 serious injury), 13 uninjured
Location
Vero Beach, FL
Aircraft
Fokker F-28 MK4000 F-28 MK400
Tail Number
N489US
Operator
Usair
Injuries
Serious
NTSB Number
MIA89LA228
THE CAPT RPRTD THAT, WHILE CRUISING IN VISUAL METEOROLOGICAL CONDITIONS, THE ACFT ENCOUNTERED SEVERE TURBULENCE, WHICH CONTD FOR ABOUT 10 SECONDS. THE SEAT BELT SIGN WAS ILLUMINATED, BUT A FLT ATTENDANT, WHO WAS NOT SEATED, SUFFERED A BROKEN ANKLE. NO FORECAST FOR TURBULENCE OR PIREPS WERE RPRTD.
NTSB Probable Cause
IN-FLIGHT ENCOUNTER WITH UNFORECAST TURBULENCE, WHICH RESULTED IN INJURY OF A FLIGHT ATTENDANT, WHO WAS NOT WEARING A SAFETY BELT.
Full Narrative
THE CAPT RPRTD THAT, WHILE CRUISING IN VISUAL METEOROLOGICAL CONDITIONS, THE ACFT ENCOUNTERED SEVERE TURBULENCE, WHICH CONTD FOR ABOUT 10 SECONDS. THE SEAT BELT SIGN WAS ILLUMINATED, BUT A FLT ATTENDANT, WHO WAS NOT SEATED, SUFFERED A BROKEN ANKLE. NO FORECAST FOR TURBULENCE OR PIREPS WERE RPRTD.
Flight
Event TypeAccident
Event Time18:58 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftFokker F-28 MK4000 F-28 MK400
Tail NumberN489US
Aircraft CategoryAir
OperatorUsair
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsRolls-Royce · MK 555-15H · Turbofan · 9900
Seats69
People & Injuries
Injury Summary1 injury (1 serious injury), 13 uninjured
Fatal0
Serious1
Minor0
Uninjured13
Total14
Crew 1Age 37 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind150° @ 15 kt, gusting 20 kt
Visibility5 sm
CeilingBroken clouds 600 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time23:06
Weather SourceWFAC