NTSB Identification: DEN84FU004.
The docket is stored on NTSB microfiche number 26759.
Accident occurred Friday, May 04, 1984 in BERTHOUD, CO
Aircraft: EIPPER QUICKSILVER MX, registration: NONE
Injuries: 1 Serious.

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 ULTRALIGHTS WERE FLYING IN LOOSE FORMATION ON A SHORT X-COUNTRY. DURING THE FLT, THE WIND SHIFTED TO THE EAST AND CREATED SOME TURBULENCE AND DOWNDRAFTS NEAR THE END OF THE JOURNEY ON FINAL APPROACH. THE LEAD VEHICLE LANDED WITHOUT KNOWLEDGE THAT HIS COMPANION HAD CRASHED. WITNESSES SAW THE ACCIDENT ULTRALIGHT IN APPARENT TROUBLE DESCENDING AND ASCENDING BEFORE DIVING INTO THE GROUND. THE SURVIVING PLT OF THE OTHER ACFT SAID HE ENCOUNTERED A SINK OVER A DEPRESSION WHILE ON FINAL, BUT NEEDED IT TO LOSE ALT SO IT DID NOT BOTHER HIM AND HE LANDED WITHOUT INCIDENT. THE VEHICLE WAS FOUND INTACT AND ALL ACFT PARTS WERE ACCOUNTED FOR. INVESTIGATION DID NOT REVEAL ANY EVIDENCE OF AN INFLIGHT MALFUNCTION OR FAILURE.

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

COMPENSATION FOR WIND CONDITIONS..IMPROPER..PILOT IN COMMAND

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

AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND

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

STALL..UNCONTROLLED..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..UNFAVORABLE WIND


Contributing Factors

WEATHER CONDITION..TURBULENCE


Contributing Factors

WEATHER CONDITION..DOWNDRAFT


Contributing Factors

LACK OF TOTAL EXPERIENCE..PILOT IN COMMAND

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