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NTSB Report
February 14, 1990 · Mitsubishi MU-2B-60 · N300CW
Putnam, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 14, 1990
Injury Outcomes
5 injuries (5 fatalities)
Location
Putnam, TX
Aircraft
Mitsubishi MU-2B-60
Tail Number
N300CW
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
FTW90FA072
BFR TKOF, SAN ANGELO AFSS BRIEFER TOLD THE PLT COMPUTERS WERE DWN IN SOUTH TX FOR 1.5 HRS & NO CURRENT WX INFO WAS AVBL. CURRENT WX INFO WAS AVBL AT NWS AT MIDLAND & FSS'S AT MIDLAND, MCALESTER & DE RIDDER, BUT THE PLT DIDN'T CALL THESE, NORDID THE BRIEFER ADZ HIM TO DO SO. PLT DIDN'T UPDATE WX IN FLT. ABT 38 MIN AFTER TKOF, IN AREA OF POTENTIAL ICING, ACFT SLOWED FM 270 TO 150 KTS GS IN 4 MIN, THEN SLOWED TO 100 KTS IN NEXT 12 SEC. ABT 33 SEC BFR RCHG 100 KTS, PLT RQD DSCNT FM 15,000' TO 13,000'. AT THAT TIME, TRUE GND TRACK WAS APRX 080 DEG WITH WND ALOFT ABT 213 DEG AT 43 KTS. BFR ATC COULDCLR DSCNT, ACFT DSCNDD TO 14,800, THEN RADAR CTC WAS LOST AFTER 1 RTRN AT 9700'. DSCNT RATE BTN LAST 2 ALTS: 12,750 FPM. NO PREIMPACT MALFUNCTION WAS FND. IMC EXISTED ABV 12,500'. FRZG LVL WAS FCST AT 10,000' TO 12,000'. ACFT WAS CERT FOR FLT IN KNOWN ICING CONDS, BUT STATUS OF ANTI-ICE/DE-ICE EQUIP WASN'T DTRMD DUE TO IMPACT/FIRE DMG. LOW LVLS OF ETHANOL WERE FND IN TOX SAMPLES FM ALL OCCUPANTS; HOWEVER, THERE WAS EVIDENCE THAT THE TOX SAMPLES WERE UNRELIABLE.
NTSB Probable Cause
IMPROPER PLANNING/DECISION BY THE PILOT, WHICH RESULTED IN EXCESSIVE ACCUMMULATION OF STRUCTURAL ICING (ON THE AIRCRAFT'S WINGS, STABILIZERS, FUSELAGE, AND/OR ENGINE INLETS), AND HIS FAILURE TO MAINTAIN ADEQUATE AIRSPEED AND AIRCRAFT CONTROL. FACTORS RELATED TO THE ACCIDENT WERE: THE PILOT'S INADEQUATE WEATHER EVALUATION DUE TO LACK OF AVAILABLE INFORMATION AT THE AUTOMATED FLIGHT SERVICE STATION (AFSS), HIS FAILURE TO OBTAIN ADDITIONAL INFORMATION FROM OTHER WEATHER STATIONS (EITHER BEFORE TAKEOFF OR DURING THE FLIGHT), HIS LACK OF EXPERIENCE IN THIS MAKE AND MODEL OF AIRCRAFT, AND ICING CONDITIONS AT CRUISE ALTITUDE.
Full Narrative
BFR TKOF, SAN ANGELO AFSS BRIEFER TOLD THE PLT COMPUTERS WERE DWN IN SOUTH TX FOR 1.5 HRS & NO CURRENT WX INFO WAS AVBL.CURRENT WX INFO WAS AVBL AT NWS AT MIDLAND & FSS'S AT MIDLAND, MCALESTER & DE RIDDER, BUT THE PLT DIDN'T CALL THESE, NORDID THE BRIEFER ADZ HIM TO DO SO. PLT DIDN'T UPDATE WX IN FLT. ABT 38 MIN AFTER TKOF, IN AREA OF POTENTIAL ICING, ACFT SLOWED FM 270 TO 150 KTS GS IN 4 MIN, THEN SLOWED TO 100 KTS IN NEXT 12 SEC. ABT 33 SEC BFR RCHG 100 KTS, PLT RQD DSCNT FM 15,000' TO 13,000'. AT THAT TIME, TRUE GND TRACK WAS APRX 080 DEG WITH WND ALOFT ABT 213 DEG AT 43 KTS. BFR ATC COULDCLR DSCNT, ACFT DSCNDD TO 14,800, THEN RADAR CTC WAS LOST AFTER 1 RTRN AT 9700'. DSCNT RATE BTN LAST 2 ALTS: 12,750 FPM.NO PREIMPACT MALFUNCTION WAS FND. IMC EXISTED ABV 12,500'. FRZG LVL WAS FCST AT 10,000' TO 12,000'. ACFT WAS CERT FOR FLT IN KNOWN ICING CONDS, BUT STATUS OF ANTI-ICE/DE-ICE EQUIP WASN'T DTRMD DUE TO IMPACT/FIRE DMG. LOW LVLS OF ETHANOL WERE FND IN TOX SAMPLES FM ALL OCCUPANTS; HOWEVER, THERE WAS EVIDENCE THAT THE TOX SAMPLES WERE UNRELIABLE.
Flight
Event TypeAccident
Event Time07:53 CST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftMitsubishi MU-2B-60
Tail NumberN300CW
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE-331 · Turboprop · 778
Seats11
People & Injuries
Injury Summary5 injuries (5 fatalities)
Fatal5
Serious0
Minor0
Uninjured0
Total5
Crew 1Age 51 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 10 kt
Visibility15 sm
CeilingOvercast 1700 ft
Temperature / Dew Point39 C / 25 C
Altimeter29.00 inHg
Observation Time13:50