Sunday, July 22, 2012

Loss of Control on Ground: Mooney M20J, N339PB; accident occurred July 21, 2012 Wittman Regional Airport (KOSH), Oshkosh, Wisconsin

Location: Oshkosh, WI
Accident Number: CEN12CA465
Date & Time: 07/21/2012, 1620 CDT
Aircraft:MOONEY M20J 
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries:1 Serious, 1 None 
Flight Conducted Under: Part 91: General Aviation - Personal


The pilot stated that, during landing, he was concentrating on touching down at a particular location, and he forced the airplane onto the runway at an airspeed that was too fast. The airplane bounced two or three times and traveled off the right side of the runway/taxiway into the grass where it contacted a taxiway light. The pilot stated that the brakes were ineffective due to the speed and the grass. The airplane continued across a service road where it contacted six heavy military vehicles that were among a row of parked vehicles. Both wings and the firewall were substantially damaged. The pilot stated that there was nothing mechanically wrong with the airplane.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot’s excessive airspeed at touchdown and his loss of control of the airplane during the landing roll.


Airspeed - Not attained/maintained (Cause)
Directional control - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Factual Information

History of Flight

Landing-landing roll
Loss of control on ground (Defining event)

Runway excursion
Collision with terr/obj (non-CFIT)

Pilot Information

Certificate: Private
Age: 73, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): Glider
Restraint Used: Seatbelt, Shoulder harness
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 Without Waivers/Limitations
Last FAA Medical Exam: 08/12/2011
Occupational Pilot: No
Last Flight Review or Equivalent: 10/15/2011
Flight Time: 2886 hours (Total, all aircraft), 2700 hours (Total, this make and model), 2867 hours (Pilot In Command, all aircraft), 40 hours (Last 90 days, all aircraft), 15 hours (Last 30 days, all aircraft), 4 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: MOONEY
Registration: N339PB
Model/Series: M20J
Aircraft Category: Airplane
Year of Manufacture:
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 24-1221
Landing Gear Type: Retractable - Tricycle
Seats: 4
Date/Type of Last Inspection: 01/10/2012, Annual
Certified Max Gross Wt.: 2740 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 5026 Hours at time of accident
Engine Manufacturer: LYCOMING
ELT: Installed
Engine Model/Series: IO-360
Rated Power: 200 hp
Operator: John C. Bartholomew
Operating Certificate(s) Held: None 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: OSH, 808 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 1553 CDT
Direction from Accident Site: 0°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 8 knots / 14 knots
Turbulence Type Forecast/Actual:
Wind Direction: 260°
Turbulence Severity Forecast/Actual:
Altimeter Setting: 30 inches Hg
Temperature/Dew Point: 31°C / 17°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Madison, WI (MSN)
Type of Flight Plan Filed: None
Destination: Oshkosh, WI (OSH)
Type of Clearance: VFR
Departure Time: 1530 CDT
Type of Airspace: Class D

Airport Information

Airport: Wittman Airport (OSH)
Runway Surface Type: Concrete
Airport Elevation: 0 ft
Runway Surface Condition: Dry
Runway Used: 36R
IFR Approach: None
Runway Length/Width: 6300 ft / 50 ft
VFR Approach/Landing: Full Stop 

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 Serious
Aircraft Fire: None
Ground Injuries:N/A 
Aircraft Explosion: None
Total Injuries: 1 Serious, 1 None
Latitude, Longitude: 43.985000, -88.561667 (est)

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