Individually Owned: 150,657
Corporate Owned: 137,281
Iowa Falls Municipal Airport
Aircraft Accident/Incident Report
Iowa Falls, Iowa 50126
Thursday, July 15, 2010 13:30 CDT
NTSB Narrative Summary Released at Completion of Accident
The accident occurred on the first test flight following the completion of the amateur-built airplane. The pilot performed high-speed taxi runs followed by a takeoff. The pilot’s flight instructor, who was at the airport watching, observed the airplane southwest of the airport in a spin, from which it recovered. The pilot then flew back to the airport, entered the traffic pattern, and made a radio call that he was going to land. On final approach the airplane appeared to be unstable. The pilot added power and performed a go-around. The airplane came around again for another approach and landing. The airplane appeared to be stable in the traffic pattern until it was on final approach, when it appeared to be unstable as if it were in slow flight. When the airplane was about 200 feet above the ground, the engine noise decreased and the nose immediately dropped along with the right wing. The airplane then impacted terrain short of the approach end of the runway. A postcrash examination of the airplane and engine did not reveal any mechanical failures or malfunctions, nor did the pilot mention any problems with the airplane during his radio calls. The pilot had recently started flying again after not having flown since 1984. He had flown 5 hours with a flight instructor in another make and model of airplane during the 7 months prior to the accident.
NTSB Probable Cause Narrative
The pilot’s failure to maintain adequate airspeed while on final approach, which resulted in an aerodynamic stall. Contributing to the accident was the pilot's lack of experience in the model of airplane.
Event Information
| Type of Event | Accident |
| Event Date | 7/15/2010 |
| Event Day of the Week | Thursday |
| Time of Event | 1330 |
| Event Time Zone | Central Daylight Time |
| Event City | Iowa Falls |
| Event State | IOWA |
| Event Country | -- |
| Zipcode of the event site | 50126 |
| Event Date Year | 2010 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 422825N |
| Event Location Longitude | 0931620W |
| Event Location Airport | Iowa Falls Municipal |
| Event Location Nearest Airport ID | IFA |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 1137 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Unknown |
| Time of the weather observation | 1354 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 81 |
| Weather Observation Facility ID | ALO |
| Elevation of weather observation facility | 873 |
| Distance of event from weather observation facility (units?) | 45 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| 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) | 27 |
| Dew Point at event time (in degress fahrenheit) | 16 |
| Wind Direction (degrees magnetic) | 350 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 6 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.02 |
| 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 | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 28197 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Sep 19 2011 1:09PM |
| User who most recently changed record | chuk |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N701KC |
| NTSB Number | CEN10LA401 |
| 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 | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | KLEMME WILLIAM H |
| Aircraft Model | ZENITH CH 701 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 7-6580 |
| Certified Max Gross Weight | 1100 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| 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 | -- |
| 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 | KLEMME WILLIAM H |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | ALDEN |
| Aircraft Owner State | IA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 50006-9112 |
| Operator is an individual? | No |
| Operator Name | KLEMME WILLIAM H |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | ALDEN |
| Operator State | IA |
| Operator Country | USA |
| Operator Zip code | 50006-9112 |
| 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) | Flight Test |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | IFA |
| Departure City | Iowa Falls |
| Departure State | IA |
| Departure Country | USA |
| Departure Time | 1315 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | IFA |
| Destination City | Iowa Falls |
| Destination State | IA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Mar 22 2011 9:55AM |
| User who most recently changed record | sulp |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 31 |
| Runway Length | 3200 |
| Runway Width | 50 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |