Aircraft Accident/Incident Report

Sultan, Washington 98294
Saturday, July 21, 2001 19:20 PDT

NTSB Narrative Summary Released at Completion of Accident

While flying westbound along US Highway 2, the pilot made an elevator input in the homebuilt, experimentally certificated Smith Mini DSA-1 aircraft, and became aware that the control stick had no effect on pitch attitude. After an initial climb, the aircraft transitioned into a descent and the pilot retarded the throttle to idle and bailed out, parachuting safely to the ground. A post-crash examination was unable to locate the one-quarter inch diameter bolt, which connects the control stick push rod to the elevator actuating bellcrank. The loss of this bolt would result in a disconnection between the pilot's control stick and the elevator, and the subsequent inability by the pilot to maintain pitch control of the aircraft.

NTSB Probable Cause Narrative

The separation/loss of the bolt and castle nut which connected the elevator bellcrank to the control stick pushrod resulting in a disconnect between the cockpit and the control surface and ultimately, the pilot's total loss of pitch control.

Event Information

Type of Event Accident
Event Date 7/21/2001
Event Day of the Week Saturday
Time of Event 1920
Event Time Zone Pacific Daylight Time
Event City Sultan
Event State WASHINGTON
Event Country --
Zipcode of the event site 98294
Event Date Year 2001
Event Date Month 7
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 --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 1853 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 263
Weather Observation Facility ID PAE
Elevation of weather observation facility 606
Distance of event from weather observation facility (units?) 40
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height 2300
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions --
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 17
Dew Point at event time (in degress fahrenheit) 12
Wind Direction (degrees magnetic) 210
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 3
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.07
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 13862
NTSB Notification Source FAA SEA ROC
NTSB Notification Date Jul 21 2001 12:00AM
NTSB Notification Time 1950
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Aug 26 2003 8:17AM
User who most recently changed record NTSB\JOHB
Basic weather conditions Visual Meteorological Cond
FAA District Office Renton FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N53BT
NTSB Number SEA01LA141
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name TAYLOR
Aircraft Model Smith Mini DSA-1
Aircraft Series Identifier --
Aircraft Serial Number 01
Certified Max Gross Weight 1150
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 1
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jun 14 2001 12:00AM
Airframe hours since last inspection 50
Airframe Hours 750
ELT Installed No
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name Gruber, Carl S.
Aircraft Owner Street Address 20904 46th Avenue East
Aircraft Owner City Spanaway
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 98387
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
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 No
Departure Airport Code EPH
Departure City ePHRATA
Departure State WA
Departure Country USA
Departure Time 1830
Departure Time Zone PDT
Destination Same as Local Flt crash at destination city
Destination Airport Code S86
Destination City Sultan
Destination State WA
Destination Country USA
Specific Phase of Flight Descent - uncontrolled
Report sent to ICAO? No
Evacuation occurred Yes
Date of most recent change to record Nov 30 2001 6:28PM
User who most recently changed record STAM
Since inspection or accident --
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --