Amateur-built BI-PLANE accident near Caldwell, Idaho, April 17, 2009
On April 17, 2009 at about 6:40 pm local time, a amateur-built BI-PLANE, registered N375CB, was substantially damaged in an accident during landing (landing roll) near Caldwell, Idaho (Caldwell Industrial Airport). It was a flight test under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
Loss of control during the landing roll for undetermined reasons.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 17, 2009 · about 6:40 pm local time
- Place
- Caldwell, Idaho · Caldwell Industrial Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built BI-PLANE
- Registration
- N375CB · registry record · serial U R 1
- Damage
- Substantial damage
- Flight
- Flight test · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot reported that during a routine test flight, he felt an abnormal vibration and decided to divert to a nearby airport. After noting the wind conditions, the pilot entered the airport traffic pattern and proceeded to execute a wheel landing in the tailwheel-equipped airplane. As the tailwheel settled onto the runway, the airplane immediately veered to the right. Despite the pilot's control and brake inputs, the airplane continued to veer to the right and exited the runway. Subsequently, the airplane came to rest in a nose-low attitude adjacent to the runway surface. Examination of the airplane by a Federal Aviation Administration inspector revealed that the left and right top and bottom wing assemblies and fuselage were structurally damaged. Flight control continuity was established throughout the airplane to all flight controls. Movement of the tailwheel by hand revealed that it locked into its normal turning radius and subsequently broke free with little pressure. No anomalies could be found with the airframe; however, examination of the runway revealed a black rubber transfer mark with a width corresponding to the width of the airplane's tailwheel. The mark was not linear, but had a zigzag shape consistent with the tailwheel shimmying.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of control on ground during landing (landing roll) defining event
- Runway excursion during landing (landing roll)
- Nose over/nose down during landing (landing roll)
The NTSB's findings
- cause Not determined › Not determined › (general) › (general) › Unknown/Not determined
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › (general) › Not specified
Pilot
- Certificate: flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; single-engine sea; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 15,900 hours in all; 2 in this make and model; 60 in the last 90 days; 20 in the last 30 days; 15,613 as pilot in command; 974 on instruments
- Last flight review: May 26, 2008
- Seat: frt
- Injury: no injuries
The aircraft
- Airframe total time: 2 hours
- Last inspection: annual inspection, March 21, 2009; 2 hours since
- Maximum gross weight: 1,000 lb
- Seats: 1
- Landing gear: fixed
- Engine: Continental C85 (piston); 0 hours total
The flight
- Departed from: ID40 Marsing ID at 5:30 pm
- Destination: ID40 Caldwell ID
- Flight plan: none
- Runway 30, 5,500 ft by 100 ft
Weather at the time
- Light: daylight
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 57°F (14°C), dew point 34°F (1°C)
- Altimeter: 30.00 inHg
- Observation at 6:35 pm from EUL
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.