Aircraft Accident/Incident Report

Omaha, Nebraska 68101
Saturday, August 10, 2002 17:00 CDT

NTSB Narrative Summary Released at Completion of Accident

The experimental airplane sustained substantial damage during a forced landing to a bean field after a partial loss of engine power during cruise flight. The pilot reported he was flying at 2,400 feet mean sea level when the engine began to run sporadically with large fuel pressure fluctuations. Attempts to restore engine power failed and the pilot executed a forced landing. The inspection of the airplane's flight controls and engine controls revealed continuity with no anomalies. The inspection revealed that the engine driven fuel pump, throttle body, fuel nozzles, fuel flow divider, electric fuel pump, and the magnetos were in good operating condition. A fuel sample was tested and it tested in the normal range with no contamination. During the inspection of the fuel system, approximately one and a half gallons were drained from the quick drain at the bottom of the fuselage before the fuel "slowed to a dribble." The inspection revealed that two drilled-out rivet heads were restricting the fuel line between the main fuel tank and the header tank. Approximately 19 gallons of fuel were drained from the main fuel tank. The inspection revealed that the tank did not have a finger screen installed at the outlet port. The two drilled out rivet heads found in the fuel line had not been used in the construction of the fuel tank and were foreign to the fuel system. The engine was removed from the airframe for an engine run. The engine operated normally at idle power and at full power during the engine run.

NTSB Probable Cause Narrative

The partial loss of engine power due to fuel starvation as a result of a restricted fuel line, and the unsuitable terrain for landing encountered by the pilot. A contributing factor was the bean field.

Event Information

Type of Event Accident
Event Date 8/10/2002
Event Day of the Week Saturday
Time of Event 1700
Event Time Zone Central Daylight Time
Event City Omaha
Event State NEBRASKA
Event Country --
Zipcode of the event site 68101
Event Date Year 2002
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 411145N
Event Location Longitude 0960644W
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 Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 5000
Sky/Lowest/Cloud Conditions Scattered
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) 32
Dew Point at event time (in degress fahrenheit) 18
Wind Direction (degrees magnetic) --
Variable Wind Indicator --
Wind Speed (knots) --
Wind Velocity Indicator Calm
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.08
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 3
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 14419
NTSB Notification Source FAA
NTSB Notification Date Aug 12 2002 12:00AM
NTSB Notification Time 1000
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Nov 25 2003 11:36AM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office FAA-Lincoln FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N98TW
NTSB Number CHI02LA242
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 Rare Aircraft
Aircraft Model WACO T-10
Aircraft Series Identifier --
Aircraft Serial Number 2502
Certified Max Gross Weight 3000
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 3
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection May 30 2002 12:00AM
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name William L. Gottenberg
Aircraft Owner Street Address 6416 S. 170th St.
Aircraft Owner City Omaha
Aircraft Owner State NE
Aircraft Owner Country USA
Aircraft Owner Zipcode 68135
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 MLE
Departure City Omaha
Departure State NE
Departure Country USA
Departure Time 1630
Departure Time Zone CDT
Destination Same as Local Flt --
Destination Airport Code AHQ
Destination City Wahoo
Destination State NE
Destination Country USA
Specific Phase of Flight Cruise
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Oct 16 2003 8:28AM
User who most recently changed record SULP
Since inspection or accident --
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --