NTSB Identification: SEA86FA225.
The docket is stored on NTSB microfiche number 31978.
Accident occurred Monday, August 25, 1986 in MESQUITE, NV
Aircraft: CESSNA 340A, registration: N340MV
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.

WHILE EN ROUTE, THE PLT WAS CLEARED TO DEVIATE 20 DEG LEFT OF COURSE TO AVOID THUNDERSTORM (TSTM) ACTIVITY THAT ARTCC RADAR SHOWED WAS RGT OF COURSE. THE PLT RPRTD TURBC, BUT DEMURRED DESCENDING TO A LOWER ALT DESPITE A PIREP OF CLEAR WX BELOW. HE THEN RPRTD 'IN A CELL' WITH TURBC. RADAR & RADIO CONTACT WITH THE ACFT WERE LOST. ANOTHER PLT, WHO FLEW APRX 15 MI FURTHER SOUTH, RPRTD NO WX, BUT SAID THERE WAS EXTREME WX TO THE NORTH WITH NEAR CONSTANT LIGHTNING. SUBSEQUENTLY,N340MV IMPACTED THE GROUND IN A STEEP NOSE-DOWN, LEFT WING LOW ATTITUDE, AFTER A 14,000 FT DSCNT. THE LANDING GEAR WAS EXTENDED WHEN THE PLANE CRASHED. AN EXAM OF THE WRECKAGE REVEALED NO PREIMPACT STRUCTURAL FAILURE OR ACFT COMPONENT MALFUNCTION. ALSO, THE WRECKAGE SHOWED NO EVIDENCE OF WEATHER DAMAGE FROM HAIL OR LIGHTNING. HOWEVER, WX INFO SHOWED THERE WAS HIGH ALT TSTM ACTIVITY WITH TURBC IN THE AREA AT THE TIME OF THE MISHAP.

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

REASON FOR OCCURRENCE UNDETERMINED..PILOT IN COMMAND

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND



Contributing Factors

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


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

WEATHER CONDITION..THUNDERSTORM


Contributing Factors

WEATHER CONDITION..LIGHTNING


Contributing Factors

WEATHER CONDITION..TURBULENCE(THUNDERSTORMS)

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