Aircraft Accident/Incident Report

Roche Harbor, Washington 98250
Sunday, September 28, 2003 14:00 PDT

NTSB Narrative Summary Released at Completion of Accident

The pilot reported that he departed with a full load of fuel (22 gallons) and flew approximately 50 nautical miles to his destination. He parked the aircraft on a slope with the right wing lower than the left and returned to the aircraft two hours later to find the right wing tank full and the "presence" of gas in the left tank and no evidence of fuel leakage. He reported that the 65 horsepower Rotax engine consumed about 5 gallons/hour and that he anticipated the fuel equalizing between the two tanks after his departure. Shortly after takeoff the pilot noted that the fuel was not equalizing between the two tanks and decided to divert. The engine ceased operating shortly thereafter and, after attempts to trouble shoot and restart were unsuccessful, he ditched the aircraft near the shore. The pilot reported that upon beaching the aircraft the right wing was observed to have about 15 gallons of fuel including some water. The fuel selector was a simple "ON-OFF" control and the valve was found open by an FAA inspector who examined the aircraft after its recovery. The inspector found no evidence of any water related pre-impact mechanical malfunction within the engine, and reported finding both carburetor bowls filled with auto gas with one or two drops of water in each.

NTSB Probable Cause Narrative

A complete loss of power due to fuel starvation for undetermined reason(s).

Event Information

Type of Event Accident
Event Date 9/28/2003
Event Day of the Week Sunday
Time of Event 1400
Event Time Zone Pacific Daylight Time
Event City Roche Harbor
Event State WASHINGTON
Event Country --
Zipcode of the event site 98250
Event Date Year 2003
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 483501N
Event Location Longitude 1230326W
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 1353 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 142
Weather Observation Facility ID FHR
Elevation of weather observation facility 113
Distance of event from weather observation facility (units?) 4
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 27
Dew Point at event time (in degress fahrenheit) 10
Wind Direction (degrees magnetic) 340
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 7
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.92
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 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 15592
NTSB Notification Source FAA SEA ROC
NTSB Notification Date Sep 28 2003 12:00AM
NTSB Notification Time 1430
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Jun 3 2004 1:28PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Renton FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N6611
NTSB Number SEA03LA197
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 Thompson
Aircraft Model Avid Flyer
Aircraft Series Identifier --
Aircraft Serial Number 209
Certified Max Gross Weight 1050
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Feb 9 2003 12:00AM
Airframe hours since last inspection 38
Airframe Hours 237
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Tatham, Mark D.
Aircraft Owner Street Address --
Aircraft Owner City Woodinville
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 98072
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 WA09
Departure City Roche Harbor
Departure State WA
Departure Country USA
Departure Time 1350
Departure Time Zone PDT
Destination Same as Local Flt --
Destination Airport Code S43
Destination City Snohomish
Destination State WA
Destination Country USA
Specific Phase of Flight Cruise
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Mar 25 2004 2:33PM
User who most recently changed record STAM
Since inspection or accident --
Event Location Runway Number and Location NA
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --