Wittman Regional Airport
Aircraft Accident/Incident Report

Oshkosh, Wisconsin 54901
Sunday, August 1, 1993 14:18 CDT

NTSB Narrative Summary Released at Completion of Accident

DURING INITIAL CLIMB THE ENGINE BACKFIRED AND SUSTAINED A POWER LOSS. THE PILOT CONFIGURED THE AIRPLANE FOR A FORCED LANDING WITH THE LANDING GEAR AND FLAPS EXTENDED. ON TOUCHDOWN THE AIRPLANE CARTWHEELED. A POST ACCIDENT EXAMINATION REVEALED THAT THE MIXTURE CONTROL WAS PARTIALLY CLOSED. NO OTHER ANOMALIES WITH THE AIRPLANE WERE FOUND ON FURTHER EXAMINATION.

NTSB Probable Cause Narrative

THE PILOT-IN-COMMAND'S INADVERTENT USE OF THE MIXTURE RESULTING IN A LEAN MIXTURE.

Event Information

Type of Event Accident
Event Date 8/1/1993
Event Day of the Week Sunday
Time of Event 1418
Event Time Zone Central Daylight Time
Event City OSHKOSH
Event State WISCONSIN
Event Country --
Zipcode of the event site 54901
Event Date Year 1993
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport WITTMAN REGIONAL
Event Location Nearest Airport ID OSH
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles 1
Degrees magnetic from airport 180
Airport Elevation 808
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1420 Central Daylight Time
Direction of event from weather observation facility (degrees) 360
Weather Observation Facility ID OSH
Elevation of weather observation facility 808
Distance of event from weather observation facility (units?) 1
Time Zone of the weather observation CDT
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) 20
Air Temperature at event time (in degrees celsius) -18
Dew Point at event time (in degress fahrenheit) -18
Wind Direction (degrees magnetic) 300
Variable Wind Indicator Unknown
Wind Speed (knots) 14
Wind Velocity Indicator Unknown
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 Serious
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None --
Injury Total Serious 1
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1627
NTSB Notification Source --
NTSB Notification Date Aug 1 1993 12:00AM
NTSB Notification Time 1419
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 11 2000 1:33PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N3025
NTSB Number CHI93FA296
Missing Aircraft Indicator N
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 GRUMMAN
Aircraft Model G58A
Aircraft Series Identifier G58A
Aircraft Serial Number 739A
Certified Max Gross Weight 9000
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
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 Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jul 14 1993 12:00AM
Airframe hours since last inspection 8
Airframe Hours --
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name WARD, ELMER F.
Aircraft Owner Street Address 1041 LA LIMONAR
Aircraft Owner City SANTA ANA
Aircraft Owner State CA
Aircraft Owner Country
Aircraft Owner Zipcode 92705
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 A
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
Departure City
Departure State
Departure Country
Departure Time 1418
Departure Time Zone CDT
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 18
Runway Length 8001
Runway Width 150
Sight Seeing flight No
Air Medical Flight No
Medical Flight --