NTSB Identification: FTW82FA108
14 CFR Part 91: General Aviation
Accident occurred Monday, March 29, 1982 in HUGHES, AR
Probable Cause Approval Date: 03/29/1983
Aircraft: GULFSTREAM AMERICAN 690C, registration: N5957K
Injuries: 1 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 ACFT HAD BEEN ON SALES DEMONSTRATION FLTS AND WAS ON A DELIVERY FLT FROM MEMPHIS, TN TO DALLAS, TX. THE PLANE WAS OBSERVED DEPARTING AT 1550 CDT IN A MAX PERFORMANCE CLIMB. RADAR INFO FROM MODE C OF THE TRANSPONDER RETURNS INDICATED THAT THE ACFT CLIMBED FROM 1000 TO 16,000 FT IN 7 MIN AND 14 SEC. LEVEL FLT WAS INDICATED AT 16,300 FT FROM 1558:16 TO 1601:17 CDT. THE LAST ALT RETURN WAS FROM 16,000 FT AT 2201:07. TWO MORE RETURNS WERE RECEIVED AT 2201:49 & 2202:08, BUT WITH NO ALTITUDE READ-OUT. AT ABOUT THAT TIME, THE ACFT WAS OBSERVED SPIRALING DOWN, COUNTERCLOCKWISE, WITH A PORTION OF THE LEFT WING MISSING. THE WING TIP (OUTER WING PANEL OUTBOARD FROM ABOUT WING STATION 190), LEFT AILERON AND LEFT ENGINE TAIL CONE PANEL WERE FOUND ABOUT 3 MI FROM THE MAIN WRECKAGE IMPACT POINT. AN EXAMINATION REVEALED THAT THE WING PANEL SEPARATION OCCURRED UPWARD FROM POSITIVE OVERLOAD FORCES. NO EVIDENCE WAS FOUND OF FATIGUE OR PRE-EXISTING FAILURE. LIGHT TO MODERATE TURBULENCE WAS REPORTED BETWEEN 14,000 AND 18,000 FT MSL.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:WING,SPAR..OVERLOAD
The National Transportation Safety Board determines the probable cause(s) of this accident to be:DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND
OVERCONFIDENCE IN PERSONAL ABILITY..PILOT IN COMMAND
OVERCONFIDENCE IN AIRCRAFT'S ABILITY..PILOT IN COMMAND
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