Beech F90 incident near Idaho Falls, Idaho, September 29, 2010
On September 29, 2010 at about 1:40 am local time, a Beech F90, registered N124BK, suffered minor damage in an incident during landing (landing roll) near Idaho Falls, Idaho (Idaho Falls Regional airport). It was a personal flight 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
The partial retraction/collapse of the main landing gear 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
- September 29, 2010 · about 1:40 am local time
- Place
- Idaho Falls, Idaho · Idaho Falls Regional · map
- Type
- Incident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Beech F90 · all F90s on the register
- Registration
- N124BK · no longer on the register · serial LA15
- Damage
- Minor damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
According to the pilot, he lowered the landing gear handle during a straight-in approach to a planned full-stop landing. Subsequently all three green "gear safe" lights illuminated, and the red "gear unsafe" light terminated its illumination. The pilot executed a normal landing touchdown on the main landing gear; however, during the landing roll the gear warning horn sounded, the red "gear unsafe" light illuminated, and the airplane began to settle toward the runway. The pilot then executed a go-around, during which the tail contacted the runway. The pilot continued the go-around, lowered the gear manually, and made an uneventful landing. A postaccident inspection revealed that for reasons that were unable to be determined, the weight of the airplane, which should have been carried by the over-center gear down locks, had been carried by the gear actuator system instead. This led to the tripping of the circuit breaker protecting the actuator electrical system, and ultimately to structural failures within the mechanical portion of the actuator system, which allowed the landing gear to partially retract.
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
- Landing gear collapse during landing (landing roll) defining event
- Dragged wing/rotor/float/other during landing (landing roll)
The NTSB's findings
- cause Aircraft › Aircraft systems › Landing gear system › Main landing gear › Not specified
- cause Not determined › Not determined › (general) › (general) › Unknown/Not determined
Pilot
- Certificate: commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 2,142 hours in all; 697 in this make and model; 71 in the last 90 days; 37 in the last 30 days; 2,058 as pilot in command; 1,001 on instruments
- Last flight review: August 4, 2010
- Medical certificate: Class 1 (without waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 8,014 hours
- Last inspection: continuous airworthiness programme, September 21, 2010
- Maximum gross weight: 10,950 lb
- Seats: 7
- Landing gear: fixed
- Engine 1: P&W PT6A SER (turboprop); 0 hours total
- Engine 2: P&W PT6A SER (turboprop); 0 hours total
- Operator: Mtb Investments LLC
The flight
- Departed from: KWYS W. Yellowstone MT at 1:15 am
- Destination: KIDA Idaho Falss ID
- Flight plan: none
- Runway 20, 9,002 ft by 150 ft
Weather at the time
- Light: dusk
- Wind: from 190° at 6 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 73°F (23°C), dew point 0°F (-18°C)
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.
Other NTSB records under N124BK the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number WPR10IA482.