Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Neshkoro, Wisconsin 54960
Wednesday, June 29, 2011 19:45 CDT
NTSB Narrative Summary Released at Completion of Accident
Prior to the local flight, the pilot, who was seated in the rear seat, completed a preflight check and engine run-up. During the initial climb, at 1,200 feet above ground level, the engine lost total power and the pilot initiated a forced landing to a private grass airstrip. While maneuvering the airplane for the forced landing, the pilot felt his left rudder pedal pressed to the floor. The pilot thought that the passenger may have been frightened and stepped on the rudder pedal. The pilot instructed to the passenger to release the rudder pedal as the airplane entered into a slip and was losing altitude; however, the passenger did not respond to the pilot. Due to the loss of altitude, the airplane was unable to reach the airstrip and impacted trees. A postaccident examination of the engine revealed that the cooling fan V-belt was broken and that the pistons exhibited scoring signatures consistent with a cold seizure. According to the manufacturer, the engine is susceptible to cold seizures when there is inadequate cooling of the cylinders, such as with a broken cooling fan V-belt. Review of the engine manufacturer’s installation and operations manual revealed warnings that "the engine by design is subject to sudden stoppage," and that it does not conform to aircraft standards.
NTSB Probable Cause Narrative
The total loss of engine power during the initial climb due to a cold seizure as a result of a broken fan V-belt. Contributing to the accident was the passenger's interference with the flight controls during the forced landing.
Event Information
| Type of Event | Accident |
| Event Date | 6/29/2011 |
| Event Day of the Week | Wednesday |
| Time of Event | 1945 |
| Event Time Zone | Central Daylight Time |
| Event City | Neshkoro |
| Event State | WISCONSIN |
| Event Country | -- |
| Zipcode of the event site | 54960 |
| Event Date Year | 2011 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 440229N |
| Event Location Longitude | 0891816W |
| 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 | 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 | -- |
| Sky/Lowest/Cloud Conditions | Few |
| 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) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 29693 |
| NTSB Notification Source | FAA Operations Center |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Mar 7 2012 3:37PM |
| User who most recently changed record | saua |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N12911 |
| NTSB Number | CEN11FA433 |
| 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 | KLEMP GREGORY J |
| Aircraft Model | CHALLENGER II |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | CH2-1296-1544 |
| Certified Max Gross Weight | 1200 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | Yes |
| Flight Crew Seats | 2 |
| 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 | Conditional |
| Date of Last Inspection | Mar 5 2011 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 172 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | C91 |
| Aircraft Owner Name | KLEMP GREGORY J |
| Aircraft Owner Street Address | N1032 21ST CT |
| Aircraft Owner City | NESHKORO |
| Aircraft Owner State | WI |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 54960-6489 |
| Operator is an individual? | No |
| Operator Name | ON FILE |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | NESHKORO |
| Operator State | WI |
| Operator Country | USA |
| Operator Zip code | 54960-6489 |
| 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 | Yes |
| Departure Airport Code | -- |
| Departure City | Neshkoro |
| Departure State | WI |
| Departure Country | USA |
| Departure Time | 1930 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | -- |
| Destination City | Neshkoro |
| Destination State | WI |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Mar 5 2012 1:51PM |
| User who most recently changed record | saua |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |