NTSB Identification: DEN87LA104.
The docket is stored on NTSB microfiche number 34013.
Accident occurred Saturday, April 18, 1987 in ALBUQUERQUE, NM
Probable Cause Approval Date: 11/08/1988
Aircraft: DEVORE SUNBIRD 100, registration: N100VL
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

AN EXPERIMENTAL DESIGNED PROTOTYPE ACFT WAS BEING FLOWN ON ITS FIRST FLT. THE ACFT TOOK OFF AND FLEW IN GROUND EFFECT BEYOND THE ARPT BOUNDARY. AT FULL PWR, THE ACFT COULD NOT MAINTAIN ALTITUDE AND DESCENDED UNCONTROLLED TO AN IMPACT WITH THE TERRAIN. THE NOSE GEAR COLLAPSED AND THE ACFT NOSED OVER. ORIGINAL DESIGN OF THE ACFT WAS 950 LBS GW WITH A 60 HP ENG. AS THIS PROTOTYPE WAS EQUIPPED ITS CLIMB RATE WAS A MINUS 75 FT/MIN. IN A POST FLT TEST THE INVOLVED ENG PRODUCED LESS THAN 40 HP. THE ACC PLT STEPPED INTO THE PROGRAM 10 DAYS BEFORE THE ACC AFTER THE ORIGINAL CONTRACTED TEST PLT QUIT. THE TEST WAS FLOWN IN SPITE OF SOME OF THE TECHNICIANS SKEPTICISM OF SUCCESS.

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

AIRCRAFT PERFORMANCE,CLIMB CAPABILITY..INADEQUATE

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

MAINTENANCE,DESIGN CHANGE..NOT UNDERSTOOD..PILOT IN COMMAND


Contributing Factors

LANDING GEAR,NOSE GEAR..OVERLOAD


Contributing Factors

PERFORMANCE DATA..INADEQUATE..MANUFACTURER

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