NTSB Identification: DEN86FA150.
The docket is stored on NTSB microfiche number 32406.
Accident occurred Wednesday, June 04, 1986 in MARIETTA, OK
Aircraft: BEECH A36TC, registration: N1835W
Injuries: 2 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.

THE PLT OBTAINED A WX BRIEFING AND WAS ADVISED OF SCATTERED THUNDERSTORM ACTIVITY ALONG HIS ROUTE OF FLT. THE PLT THEN FILED AN IFR FLT PLAN FROM WILEY POST AIRPORT, OKLAHOMA CITY, OK, TO HOUSTON INTERCONTINENTAL AIRPORT, TX. THE PLT AND HIS WIFE TOOK OFF AT 1235. THE ACFT CLIMBED TO ITS ASSIGNED ALT OF 11,000 FT MSL AND PROCEEDED ROUTINELY UNTIL 1310 WHEN ARTCC TOLD THE PLT TO CONTACT FORT WORTH CENTER. THE PLT ACKNWLEDGED BUT NEVER CONTACTED THE CENTER. RADAR CONTACT WAS LOST AT 1319. WITNESSES REPORTED HEARING A LOUD EXPLOSION AND OBSERVING WRECKAGE FALLING FROM THE SKY. WITNESS OBSERVATIONS AND WX RADAR CONFIRM THERE WAS A THUNDERSTORM JUST NORTH OF THE CRASH SITE THROUGH WHICH THE ACFT FLEW. WRECKAGE EXAMINATION REVEALED THE HORIZONTAL STABILIZERS FAILED NEGATIVELY AND SEPARATED FROM THE ACFT. BOTH WINGS THEN FAILED NEGATIVELY AND SEPARATED FROM THE ACFT.

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

HORIZONTAL STABILIZER ATTACHMENT..FAILURE,TOTAL

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

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

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

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

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

WING,SPAR..FAILURE,TOTAL



Contributing Factors

WEATHER CONDITION..THUNDERSTORM



Contributing Factors

WEATHER CONDITION..TURBULENCE(THUNDERSTORMS)


Contributing Factors

WEATHER EVALUATION..MISJUDGED..PILOT IN COMMAND


Contributing Factors

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND

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