NTSB Identification: BFO84FU001.
The docket is stored on NTSB microfiche number 26761.
Accident occurred Tuesday, July 03, 1984 in ELKTON, MD
Aircraft: EIPPER QUICKSILVER MX, 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.

THE ULTRALIGHT PILOT HAD BEEN PRACTICING MANEUVERS THAT WEREDESCRIBED AS WHIP STALLS WHICH WERE NOT TAUGHT OR AUTHORIZEDBECAUSE OF THE EXCESSIVE 'G' FORCES IMPOSED. AN INSTRUCTOR CHECKED HIS MACHINE AND WARNED HIM OF THE DANGERS ON THE DAY OF THE ACCIDENT. THE PLT SAID HE UNDERSTOOD AND WOULD 'WATCH IT'. LATER THAT DAY HE PRACTICED SIMILAR MANEUVERS AGAIN AND THE LEFT WING FOLDED FROM NEGATIVE G FORCES. THIS MACHINE IS LIMITED TO 3 NEGATIVE 'G'S'. THE VEHICLE FELL FROM ABOUT 350 FT IN A VERTICAL UNCONTROLLED DESCENT AFTER THE WING FAILED.

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

JUDGMENT..POOR..PILOT IN COMMAND

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

MANEUVER..IMPROPER..PILOT IN COMMAND

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

WING..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


Contributing Factors

OVERCONFIDENCE IN AIRCRAFT'S ABILITY..PILOT IN COMMAND

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