Aircraft Accident/Incident Report

Olympia, Washington 98502
Friday, December 7, 1990 15:50 PST

NTSB Narrative Summary Released at Completion of Accident

WHILE THE PILOT WAS PERFORMING AEROBATIC MANEUVERS, THE ACFT STALLED, ENTERED A SPIN AND IMPACTED THE GROUND IN A VERTICAL NOSE DOWN ATTITUDE.

NTSB Probable Cause Narrative

THE INADVERTANT STALL/SPIN AND LOSS OF AIRCRAFT CONTROL BY THE PILOT IN COMMAND WHILE PERFORMING AEROBATIC MANEUVERS.

Event Information

Type of Event Accident
Event Date 12/7/1990
Event Day of the Week Friday
Time of Event 1550
Event Time Zone Pacific Standard Time
Event City OLYMPIA
Event State WASHINGTON
Event Country --
Zipcode of the event site 98502
Event Date Year 1990
Event Date Month 12
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 0
Degrees magnetic from airport 0
Airport Elevation 0
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1552 Pacific Standard Time
Direction of event from weather observation facility (degrees) 45
Weather Observation Facility ID OLM
Elevation of weather observation facility 205
Distance of event from weather observation facility (units?) 3
Time Zone of the weather observation PST
Lighting Conditions Day
Lowest Ceiling Height 14000
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 30
Air Temperature at event time (in degrees celsius) 7
Dew Point at event time (in degress fahrenheit) 4
Wind Direction (degrees magnetic) 240
Variable Wind Indicator Unknown
Wind Speed (knots) 4
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) 0
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal 1
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1316
NTSB Notification Source --
NTSB Notification Date Dec 7 1990 12:00AM
NTSB Notification Time 1830
Fiche Number and/or location -used to find docket information 42628
Date of most recent change to record Dec 12 2000 5:37PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N1041
NTSB Number SEA91LA030
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name ROBINSON
Aircraft Model WENOSO
Aircraft Series Identifier WENOSO
Aircraft Serial Number H.S 1
Certified Max Gross Weight 900
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? Yes
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft --
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Unknown
Date of Last Inspection --
Airframe hours since last inspection 0
Airframe Hours --
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name UNKNOWN
Aircraft Owner Street Address
Aircraft Owner City
Aircraft Owner State
Aircraft Owner Country
Aircraft Owner Zipcode
Operator is an individual? --
Operator Name MATHEW J KIMBREL
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 1333 GERRARD CREEK ROAD
Operator City OAKVILLE
Operator State WA
Operator Country
Operator Zip code 98568
Operator Code
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code
Departure City
Departure State
Departure Country
Departure Time 1540
Departure Time Zone PST
Destination Same as Local Flt --
Destination Airport Code NONE
Destination City OAKVILLE
Destination State WA
Destination Country
Specific Phase of Flight Maneuvering
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:35AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length 0
Runway Width 0
Sight Seeing flight No
Air Medical Flight No
Medical Flight --