Cobb Co-Mccollum Field Airport
Aircraft Accident/Incident Report

Marietta, Georgia 30066
Wednesday, February 1, 1995 7:20 EST

NTSB Narrative Summary Released at Completion of Accident

ACCORDING TO THE PILOT'S WIFE, THIS FLIGHT WAS TO BE A GROUND RUN ONLY, WITH NO TAKEOFF CONTEMPLATED. THE PILOT & HIS STEPDAUGHTER WERE COMPARING ACCELERATIONS AFTER WEIGHT CHANGES FOR A SCHOOL PROJECT. A WITNESS OBSERVED FROST ON THE ACFT AS IT TAXIED TO THE RUNWAY. OTHER WITNESSES SAW THE ACFT ACCELERATE ON THE RUNWAY, ROTATE, BECOME AIRBORNE TO ABOUT FIVE FEET AGL, SETTLE TO THE RUNWAY, BECOME AIRBORNE AGAIN, & OVERRUN THE RUNWAY INTO A WIDE RAVINE. IT COLLIDED WITH THE OPPOSITE BANK & BURNED. GROUND GOUGES INDICATED THAT THE ACFT WAS AIRBORNE FOR 219 FEET PAST THE RUNWAY END. THREE GOUGES, FOR 135 FEET, INDICATED THAT THE ACFT WAS IN A SLIGHT LEFT SKID, & THE INCREASING DEPTH OF THE GOUGES INDICATED THAT BRAKES WERE APPLIED. THE ACFT CAME TO REST UPRIGHT ON A RIGHT OFFSET HEADING, FROM THE ENERGY PATH, OF ABOUT 45 DEGREES, INDICATING THAT IT VAULTED OVER THE RAVINE UPRIGHT, IN A 45 DEGREE RIGHT YAW ATTITUDE. THE POST-MORTEM EXAM DID NOT REVEAL EVIDENCE OF INCAPACITATION.

NTSB Probable Cause Narrative

The pilot's delayed abort of the ground run which resulted in a runway overrun and collision with the ravine.

Event Information

Type of Event Accident
Event Date 2/1/1995
Event Day of the Week Wednesday
Time of Event 720
Event Time Zone Eastern Standard Time
Event City MARIETTA
Event State GEORGIA
Event Country --
Zipcode of the event site 30066
Event Date Year 1995
Event Date Month 2
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport COBB CO-MCCOLLUM FIELD
Event Location Nearest Airport ID RYY
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles 1
Degrees magnetic from airport 260
Airport Elevation 1040
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 720 Eastern Standard Time
Direction of event from weather observation facility (degrees) 90
Weather Observation Facility ID RYY
Elevation of weather observation facility 1040
Distance of event from weather observation facility (units?) 1
Time Zone of the weather observation EST
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) -3
Dew Point at event time (in degress fahrenheit) -3
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) --
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 2
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 208
NTSB Notification Source --
NTSB Notification Date Feb 1 1995 12:00AM
NTSB Notification Time 745
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 7 2000 4:02PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N103JB
NTSB Number ATL95LA047
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 Ground
Aircraft Explosion None
Aircraft Manufacturer's Full Name BRANDT
Aircraft Model RUTAN LONGEZE
Aircraft Series Identifier RUTAN LONG
Aircraft Serial Number 509
Certified Max Gross Weight 1200
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 Unknown
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Unknown
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name DENNIS K. DAHL
Aircraft Owner Street Address 155 PRESTON OAK DRIVE
Aircraft Owner City ALPHARETTA
Aircraft Owner State GA
Aircraft Owner Country
Aircraft Owner Zipcode 30239
Operator is an individual? --
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? 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 RYY
Departure City
Departure State
Departure Country
Departure Time 0
Departure Time Zone
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code
Destination City
Destination State
Destination Country
Specific Phase of Flight Takeoff
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 9
Runway Length 5105
Runway Width 75
Sight Seeing flight No
Air Medical Flight No
Medical Flight --