NTSB Identification: SEA84FA178.
The docket is stored on NTSB microfiche number 25515.
Accident occurred Saturday, July 21, 1984 in HENDERSON, NV
Aircraft: SPERLING BD-4, registration: N78JC
Injuries: 2 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.
WITNESSES REPORTED OBSERVING THE ACFT DEPART TO THE SSW TOWARD THE MOUNTAINS. THE ACFT MADE A SERIES OF TURNS AND BANKS TO AVOID A GROUP OF THUNDERSTORM CELLS (AIR MASS THUNDERSTORMS) IN A DIRECTION OF INTERSTATE HIGHWAY 15. THE ACFT WAS REPORTED TO HAVE MADE SEVERAL TURNS AWAY FROM THE 'WORST' PART OF THE RAIN SHOWERS. ALL THE WITNESSES REPORTED THE ACFT 'JUST PITCHED DOWN AND WENT INTO THE GROUND.' THE THUNDERSTORM CELLS WERE NOT REPORTED ON THE 1750Z LAS VEGAS, NV, FSS SURFACE ANALYSIS WEATHER OBSERVATION.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:FLIGHT INTO KNOWN ADVERSE WEATHER..INITIATED..PILOT IN COMMAND
The National Transportation Safety Board determines the probable cause(s) of this accident to be:AIRCRAFT HANDLING..NOT MAINTAINED..PILOT IN COMMAND
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