NTSB Identification: FTW83FA031
14 CFR Part 91: General Aviation
Accident occurred Tuesday, November 02, 1982 in NORMANGEE, TX
Probable Cause Approval Date: 11/02/1983
Aircraft: CESSNA P210N, registration: N612J
Injuries: 4 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

A COMPANY PLT RECEIVED TWO WX BRIEFINGS FROM THE SAN ANTONIO FSS, ONE WAS AT ABOUT 1700 THE DAY BEFORE THE ACCIDENT & THE OTHER ON 11/2. AFTER EACH WX BRIEFING THE COMPANY PLT BRIEFED THE PLT OF THE ACCIDENT ACFT. THE ACFT DEPARTED AT ABOUT 0835. AT 0953 THE PLT CONTACTED FLIGHT WATCH & WAS ADVISED OF A CONVECTIVE SIGMET OF EMBEDDED THUNDERSTORMS. AT 1001 THE PLT REQUESTED & WAS CLEARED TO FL190. THIS WAS THE LAST RADIO CONTACT WITH THE ACFT. IN FLIGHT SEPARATION OF THE WINGS, VERTICAL & HORIZONTAL STABILIZERS OCCURRED. THE ACFT PENETRATED A DENSE AREA OF THUNDERSTORMS WITH ACTIVITY UP TO INTENSE (LEVEL 5) & PROBABLY ENCOUNTERED SEVERE TURBULENCE. IN ADDITION THERE WOULD PROBABLY BEEN MODERATE TO SEVERE ICING IN RAIN SHAFTS WITHIN THE THUNDERSTORMS AT THE ACFT'S FLIGHT ALTITUDE. THE 0817 WX BRIEFING WAS INADEQUATE IN THAT THE AREA FORECAST WHICH WARNED OF THUNDERSTORM ACTIVITY ENROUTE WAS NOT UTILIZED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLIGHT INTO KNOWN ADVERSE WEATHER..CONTINUED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLIGHT CONTROLS..IMPROPER USE OF..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND


Contributing Factors

PREFLIGHT BRIEFING SERVICE..INADEQUATE..ATC PERSONNEL(FSS)


Contributing Factors

WEATHER CONDITION..THUNDERSTORM


Contributing Factors

WEATHER CONDITION..TURBULENCE(THUNDERSTORMS)


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS





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