Individually Owned: 150,657
Corporate Owned: 137,281
Colson Creek Airport
Aircraft Accident/Incident Report
Shoup, Idaho 83469
Monday, March 25, 2002 9:00 MST
NTSB Narrative Summary Released at Completion of Accident
The pilot attempted a takeoff in an experimental aircraft who's engine/propeller combination had not produced the expected rpm since the pilot/builder changed the engine but did not change the propeller. Prior to the attempted takeoff, the pilot experienced a 250 rpm drop on each magneto during the engine run-up check. During the takeoff roll, the pilot realized that the aircraft was not performing as desired, and momentarily thought about aborting, but instead continued. After liftoff, the pilot was unable to get the aircraft to climb, and as he was making a turn over a river situated off the departure end of the runway, the aircraft stall/mushed, and one wing drug in the water. Immediately after the wing contacted the water, the aircraft cartwheeled along the river's surface, coming to rest upright in about 30 inches of water.
NTSB Probable Cause Narrative
The pilot’s failure to maintain a speed above stall speed, and the resulting inadvertent stall/mush. Factors include the pilot's failure to abort the takeoff when he realized the aircraft's performance was not as expected, his decision to attempt a takeoff after experiencing an unacceptable rpm drop on each magneto during the engine run-up check, and the failure of the magnetos to maintain an acceptable engine rpm when operated individually.
Event Information
| Type of Event | Accident |
| Event Date | 3/25/2002 |
| Event Day of the Week | Monday |
| Time of Event | 900 |
| Event Time Zone | Mountain Standard Time |
| Event City | Shoup |
| Event State | IDAHO |
| Event Country | -- |
| Zipcode of the event site | 83469 |
| Event Date Year | 2002 |
| Event Date Month | 3 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | -- |
| Event Location Longitude | -- |
| Event Location Airport | Colson Creek |
| 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 | 0.25 |
| Degrees magnetic from airport | 250 |
| Airport Elevation | 3100 |
| Weather Briefing Completeness | Unknown |
| 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 | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 20 |
| Air Temperature at event time (in degrees celsius) | 4 |
| 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 | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 12235 |
| NTSB Notification Source | FAA Operations Center |
| NTSB Notification Date | Mar 25 2002 12:00AM |
| NTSB Notification Time | 1045 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Sep 10 2002 8:12AM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Boise FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N139SP |
| NTSB Number | SEA02LA059 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Potts |
| Aircraft Model | KitFox |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 59501-0089 |
| Certified Max Gross Weight | 1550 |
| 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 | Conditional |
| Date of Last Inspection | Mar 1 2002 12:00AM |
| Airframe hours since last inspection | 3 |
| Airframe Hours | 28 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Stanley V. Potts |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Shoup |
| Aircraft Owner State | ID |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 83469 |
| Operator is an individual? | No |
| 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? | -- |
| 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 | Shoup |
| Departure State | ID |
| Departure Country | USA |
| Departure Time | 900 |
| Departure Time Zone | MST |
| Destination Same as Local Flt | -- |
| Destination Airport Code | U15 |
| Destination City | Challis |
| Destination State | ID |
| Destination Country | USA |
| Specific Phase of Flight | Takeoff |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | May 2 2002 8:02PM |
| User who most recently changed record | STAM |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 25 |
| Runway Length | 1000 |
| Runway Width | 60 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |