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March 5, 1986 · Mitsubishi MU-2B-60 · N513DC
Eola, IL
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 5, 1986
Injury Outcomes
5 injuries (5 fatalities)
Location
Eola, IL
Aircraft
Mitsubishi MU-2B-60
Tail Number
N513DC
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
CHI86FA098
EVIDENCE SHOWS CO-PILOT CALLED, 'MAYDAY, UNCONTROLLED SPIN' AFTER ACFT RADAR TRACK SHOWED DECEL FROM 180 TO 120 KTS OVER 2 MIN PERIOD WHILE MAINTAINING CONSTANT 4000 FT CRZ ALT. CONSTANT ALT CONSISTENT WITH AUTOPILOT/AUTOTRIM USE, PARTICULARLY IN VIEW OF REPORTED TURBULENCE/ICING. ELEV TRIM FOUND AT APPROX 13 DEG NOSE UP. NO EVIDENCE FOUND OF PREIMPACT FAILURE OR MALFUNCTION IN ACFT PWRPLANTS, STRUCTURE OR SYSTEMS. EVIDENCE SUGGESTS SCENARIO OF CREW INATTENTION AFTER PWR REDUCTION WITH AUTOPILOT ALTITUDE SETTING. ON PWR APPLICATION, ACFT PITCHED UP FROM SLOW SPEED INTO UNCONTROLLED FLIGHT. DUTY DAY AT TIME OF MISHAP APPROACHING 11 HOURS.
Full Narrative
EVIDENCE SHOWS CO-PILOT CALLED, 'MAYDAY, UNCONTROLLED SPIN' AFTER ACFT RADAR TRACK SHOWED DECEL FROM 180 TO 120 KTS OVER 2 MIN PERIOD WHILE MAINTAINING CONSTANT 4000 FT CRZ ALT. CONSTANT ALT CONSISTENT WITH AUTOPILOT/AUTOTRIM USE, PARTICULARLY IN VIEW OF REPORTED TURBULENCE/ICING. ELEV TRIM FOUND AT APPROX 13 DEG NOSE UP. NO EVIDENCE FOUND OF PREIMPACT FAILURE OR MALFUNCTION IN ACFT PWRPLANTS, STRUCTURE OR SYSTEMS. EVIDENCE SUGGESTS SCENARIO OF CREW INATTENTION AFTER PWR REDUCTION WITH AUTOPILOT ALTITUDE SETTING. ON PWR APPLICATION, ACFT PITCHED UP FROM SLOW SPEED INTO UNCONTROLLED FLIGHT. DUTY DAY AT TIME OF MISHAP APPROACHING 11 HOURS.
Flight
Event TypeAccident
Event Time17:06 CST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftMitsubishi MU-2B-60
Tail NumberN513DC
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE331-10501M · Turboprop · 778
Seats10
People & Injuries
Injury Summary5 injuries (5 fatalities)
Fatal5
Serious0
Minor0
Uninjured0
Total5
Crew 1Age 37 · First Class
Conditions
ConditionsIMC
LightDaylight
Wind280° @ 15 kt
Visibility1 sm
Ceiling300 ft
Temperature / Dew Point34 C / 0 C
Altimeter29.00 inHg
Observation Time22:50
Weather SourceWFAC