Aircraft Accident/Incident Report

Eatonville, Washington 98328
Wednesday, August 5, 2009 20:20 PDT

NTSB Narrative Summary Released at Completion of Accident

The airplane's engine lost power during cruise flight and the pilot executed a forced landing to a field. During the landing, the main landing gear encountered tall grass and collapsed. Examination of the airplane revealed that the fuselage sustained structural damage. Examination of the engine revealed no evidence of any preimpact mechanical discrepancies that would have prevented normal operation. The airplane was equipped with two 12.5-gallon wing fuel tanks, each of which had its own two-position (on-off) fuel selector valve. The left wing fuel tank was found empty and the right wing fuel tank contained about 4.5 gallons of fuel. During the accident flight, both fuel selector valves were in the 'ON' position, which was the pilot’s normal operating procedure. The airplane does not use an interconnected fuel vent system, but instead uses individual vents in the caps of each tank. With both fuel tank selector valves in the 'ON' position, if one vent is plugged, or partially misaligned, the vent pressure difference will result in unequal fuel flow to the engine and will move fuel from the higher pressure vent/tank to the lower pressure vent/tank. Also, if both fuel tank selector valves are in the 'ON' position, prolonged uncoordinated flight with one wing lower than the other will result in unequal fuel flow to the engine and in fuel flowing from the high to the low wing tank. The loss of engine power was likely due to unequal fuel feed to the engine from the two wing fuel tanks, which resulted in the left tank running dry and interrupting fuel flow to the engine. The reason for the unequal fuel feed was not determined.

NTSB Probable Cause Narrative

The loss of engine power due to fuel starvation as a result of the pilot's inadequate in-flight fuel management. Contributing to the accident was the airplane's lack of an interconnected fuel vent system.

Event Information

Type of Event Accident
Event Date 8/5/2009
Event Day of the Week Wednesday
Time of Event 2020
Event Time Zone Pacific Daylight Time
Event City Eatonville
Event State WASHINGTON
Event Country --
Zipcode of the event site 98328
Event Date Year 2009
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 465503N
Event Location Longitude 1221511W
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 --
Investigator's weather source Weather Observation Facility
Time of the weather observation 2010 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 360
Weather Observation Facility ID PLU
Elevation of weather observation facility 538
Distance of event from weather observation facility (units?) 14
Time Zone of the weather observation PDT
Lighting Conditions Dusk
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) 19
Dew Point at event time (in degress fahrenheit) 10
Wind Direction (degrees magnetic) 280
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 6
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.95
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) 26105
NTSB Notification Source FAA ROC
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Dec 8 2009 9:20AM
User who most recently changed record johb
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N28425
NTSB Number WPR09LA390
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name LUSCOMBE
Aircraft Model 8A
Aircraft Series Identifier --
Aircraft Serial Number 1292
Certified Max Gross Weight 1200
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
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 Apr 2 2009 12:00AM
Airframe hours since last inspection 40
Airframe Hours 4791
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type Unknown
Aircraft Owner Name BENNETT WAYNE M
Aircraft Owner Street Address --
Aircraft Owner City PUYALLUP
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 98372-7111
Operator is an individual? Yes
Operator Name BENNETT WAYNE M
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City PUYALLUP
Operator State WA
Operator Country USA
Operator Zip code 98372-7111
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
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 PLU
Departure City Puyallup
Departure State WA
Departure Country USA
Departure Time 1900
Departure Time Zone PDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code PLU
Destination City Puyallup
Destination State WA
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Sep 25 2009 3:06PM
User who most recently changed record coos
Since inspection or accident Last Inspection
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --