Diamond DA42 accident near Mandan, North Dakota, September 1, 2024
On September 1, 2024 at about 8:20 pm local time, a 2017 Diamond DA42, registered N705JP, was substantially damaged in an accident during landing (landing roll) near Mandan, North Dakota (Mandan Rgnl/Lawler Fld airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot’s failure to perform a go-around following an unstable approach while landing with a tailwind, which resulted in the airplane touching down long on the runway with insufficient distance to stop. Contributing to the accident was the pilot’s selected flap setting which increased the airplane’s landing roll.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 1, 2024 · about 8:20 pm local time
- Place
- Mandan, North Dakota · Mandan Rgnl/Lawler Fld · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Diamond DA42 NG, built 2017
- Registration
- N705JP · registry record · serial 42.N249
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot estimated that he touched down about 100 ft past the numbers while landing. He attempted to decelerate, keeping constant pressure on the brakes. The pilot stated that the brakes were not working until he approached the end of the runway, at which point the brakes “slowly got responsive.” The pilot reported that a go-around was possible and that it was a “shock” that he couldn’t stop the airplane. He reported that the approach and landing was made with the flaps set to “APP.” The airplane exited the paved surface of the runway and impacted a runway end identifier light, resulting in substantial damage to the fuselage. A postaccident examination of the brake system revealed no anomalies that would have precluded normal operation, and a postaccident runway inspection by the airport manager revealed visible tire skid marks leading off the end of the runway. An aircraft performance study using ADS-B and engine control unit (ECU) data concluded that the airplane touched down at 92 kts calibrated airspeed (KCAS), 6 kts faster than the 86-kt VREF speed calculated from the airplane flight manual. The airplane’s weight on wheels sensors indicated that the airplane was not fully on the ground until 2,136 ft past the runway threshold. The airplane landed in a 6.3 kt tailwind that would have increased landing distance by 21%. Considering all factors, the study concluded that insufficient runway remained after the touchdown for the airplane to stop. Additionally, the study concluded that had the pilot used the LDG flap setting, there would have been sufficient runway remaining.
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
- Runway excursion during landing (landing roll) defining event
The NTSB's findings
- Environmental issues › Conditions/weather/phenomena › Wind › Tailwind › Effect on operation
- Personnel issues › Action/decision › Info processing/decision › Decision making/judgment › Pilot
- Environmental issues › Physical environment › Object/animal/substance › Runway/taxi/approach light › Contributed to outcome
- Personnel issues › Task performance › Use of equip/info › Use of equip/system › Pilot
Pilot
- Certificate: private
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 1,153 hours in all; 330 in this make and model; 12 in the last 90 days; 5 in the last 30 days; 996 as pilot in command
- Last flight review: November 17, 2023
- Medical certificate: Class 3 (without waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 500 hours
- Last inspection: annual inspection, September 27, 2023
- Maximum gross weight: 4,407 lb
- Seats: 4
- Landing gear: retractable
- Engine 1: Austro E4C (piston); 500 hours total
- Engine 2: Austro E4C (piston); 500 hours total
The flight
- Departed from: BIS Bismark ND at 8:09 pm
- Destination: Y19 Mandan ND
- Flight plan: none
- Runway 13/3, 4,399 ft by 75 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 170° at 7 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 75°F (24°C), dew point 48°F (9°C)
- Altimeter: 30.28 inHg
- Observation at 3:15 pm from KY19
Weather report (METAR): KY19 012015Z AUTO 17007KT 10SM CLR 24/09 A3028 RMK AO2
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 1 |
Photographs from the investigation 6 pictures from the NTSB's docket, as the NTSB released them
Photograph 1 – Fuselage Damage
Photograph 2 – Fuselage Damage
Photograph 3 – Lower Fuselage
Photograph 4 – Left Brake Assembly
Photograph 5 – Right Brake Assembly
Photograph 6 – Skid marksThe NTSB's photographs with the NTSB's captions, at screen size. Open a picture to see it full size or to report one that should not be shown.
Documents from the investigation the NTSB's docket: the evidence folder behind the report
13 documents, released by the NTSB on July 29, 2026. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 10 pages | View Download |
| 2 | Record of Conversation - Pilot | PDF, 1 page | View Download |
| 3 | Memorandum for Record A�� Mechanic | PDF, 1 page | View Download |
| 4 | AFM Landing Distance Excerpt | PDF, 8 pages | View Download |
| 5 | Video File | video | View Download |
| 6 | Passenger Statement | PDF, 2 pages | View Download |
| 7 | ADS-B Data | spreadsheet | Download |
| 8 | Aircraft Performance Study | PDF, 24 pages | View Download |
| 9 | Investigation Photographs | PDF, 7 pages · our copy | View Download |
| 10 | Engine Control Unit Datalog A | spreadsheet | Download |
| 11 | Engine Control Unit Datalog B | spreadsheet | Download |
| 12 | Engine Control Unit Event Recorder | spreadsheet | Download |
| 13 | Email Correspondence | PDF, 1 page | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
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.