NTSB Identification: SEA88LA107.
The docket is stored on NTSB microfiche number 36623.
Accident occurred Wednesday, June 08, 1988 in WENATCHEE, WA
Probable Cause Approval Date: 07/26/1989
Aircraft: BEECH A36, registration: N7243X
Injuries: 2 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.

AIRFRAME ICE WAS ACCUMULATING ON THE AIRCRAFT AT 13,000 FEET SO THE PILOT REQUESTED AN ALTITUDE OF 14,000 FEET. AT 14,000 FEET THE PILOT LOST CONTROL OF THE AIRCRAFT AND DESCENDED DOWN TO 6,500 FEET BEFORE RECOVERING. THE PILOT HAD STATED THAT HE FELT HE HAD AN AUTOPILOT FAILURE. THE AUTOPILOT WAS INSPECTED BUT NO ABNORMALITIES COULD BE DETERMINED. TOWERING CUMULUS CLOUDS WERE PRESENT AT ALL QUADRANTS NEAR THE AIRPORT AT THE TIME OF THE ACCIDENT. THE ACFT LANDED WITHOUT FURTHER DAMAGE. EXAMINATION OF THE AIRCRAFT REVEALED EXTREME BUCKLING OF THE AIRCRAFT STRUCTURE.

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

WING..ICE

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:

STALL/SPIN..INADVERTENT..PILOT IN COMMAND

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

IN-FLIGHT WEATHER ADVISORIES..NOT OBTAINED..PILOT IN COMMAND

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

WEATHER EVALUATION..INADEQUATE..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..TURBULENCE IN CLOUDS


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS

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