NTSB Identification: ANC83FU003.
The docket is stored on NTSB microfiche number 22390.
Accident occurred Sunday, April 10, 1983 in GIRDWOOD, AK
Aircraft: PTERADACTYL ASCENDER, registration: NONE
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.

ACCORDING TO A WITNESS, THE ULTRALIGHT VEHICLE HAD JUST TAKEN OFF, HAD TURNED TO A DOWNWIND HEADING & WAS CLIMBING, WHEN IT BEGAN TO OSCILLATE LONGITUDINALLY. AFTER A FEW OSCILLATIONS, THE VEHICLE NOSED OVER, THE WINGS FOLDED & THE ULTRALIGHT CRASHED TO THE GROUND. ALL PARTS OF THE ULTRALIGHT WERE ACCOUNTED FOR & AN EXAM REVEALED THAT THE FRACTURES WERE INDICATIVE OF OVERLOAD FAILURES. REPORTEDLY, THE PLT HAD ONLY ABOUT 5 TO 10 HRS IN THIS MAKE & MODEL. ACCORDING TO THE PLT'S FRIENDS, THEY HAD HEARD HIM TALK ABOUT HAVING TO HOLD THE NOSE DOWN DURING FLT. THEY STATED HE HAD A TENDENCY TO 'BURY THE AIRSPEED' WHILE FLYING. ACCORDING TO OTHER PLTS THAT HAVE FLOWN THIS ULTRALIGHT VEHICLE, THE PTERODACTYL CAN ACHIEVE 55 KTS WITH ONLY SLIGHTLY OVER HALF THROTTLE, IT BECOMES INCREASINGLY PITCH SENSITIVE AT HIGH SPEEDS & IT REQUIRES EXCESSIVE NOSE DOWN PITCH CONTROL ABOVE 55 KTS.

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

AIRCRAFT HANDLING..NOT MAINTAINED..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

WING..OVERLOAD


Contributing Factors

LACK OF TOTAL EXPERIENCE IN TYPE OF AIRCRAFT..PILOT IN COMMAND

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