NTSB Identification: SEA87FA145.
The docket is stored on NTSB microfiche number 35406.
Accident occurred Tuesday, July 21, 1987 in AVERY, ID
Probable Cause Approval Date: 12/27/1988
Aircraft: CESSNA T210N, registration: N6326Y
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 IN CRUISE AT 15000 FT MSL, PLT REQUESTED ATC DEVIATION AROUND TSTM SHOWN ON ACFT STORMSCOPE. AFTER PASSING, ATC GAVE VECTOR TO REJOIN AIRWAY. PLT REQUESTED FURTHER DEVIATION AROUND ANOTHER CELL. RADIO AND RADAR CONTACT WERE THEN LOST. INVESTIGATION REVEALED CHARACTERISTICS OF LOW LEVEL INFLT BREAKUP DUE PILOT INDUCED OVERLOAD. WX AND RADAR STUDY SHOW ACFT PENETRATED HEART OF TSTM OF AT LEAST MODERATE INTENSITY.

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

DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND

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

FLIGHT INTO KNOWN ADVERSE WEATHER..INADVERTENT..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..THUNDERSTORM,LEVEL II


Contributing Factors

WEATHER CONDITION..TURBULENCE(THUNDERSTORMS)




Contributing Factors

REMEDIAL ACTION..ATTEMPTED..PILOT IN COMMAND

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