Boeing A75N1(PT17) accident near Monticello, Utah, September 13, 2023
On September 13, 2023 at about 5:00 pm local time, a 1942 Boeing A75N1(PT17), registered N10KP, was substantially damaged in an accident during initial climb near Monticello, Utah (Monticello airport). It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
A partial loss of engine power for reasons that could not be determined.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 13, 2023 · about 5:00 pm local time
- Place
- Monticello, Utah · Monticello · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Boeing A75N1(PT17), built 1942 · all A75N1(PT17)s on the register
- Registration
- N10KP · registry record · serial 755247
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot departed the airport, conducted a low pass over the runway, and was climbing the airplane to pattern altitude when the engine began to lose power. The pilot stated that the engine did not lose complete power; however, the rpm and airspeed continued to decline and he chose to make a forced landing. The airplane landed in heavily vegetated terrain and during the landing roll the left main landing gear collapsed, resulting in substantial damage to the lower left wing. A postaccident examination of the airframe and engine revealed no evidence of any preaccident mechanical malfunctions or failures that would have precluded normal operation. Although remnants of a high-temperature cloth were found between the air filter and particle screen, no debris was found in the filter or induction screen and the air intake did not appear to be impeded. Based on the available information, the reason for the loss of engine power could not be determined.
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
- Collision with terrain or object (not controlled flight into terrain) during emergency descent
- Unknown or undetermined during initial climb defining event
The NTSB's findings
- Not determined › Not determined › (general) › (general) › Unknown/Not determined
Pilot
- Certificate: private
- Ratings: single-engine land
- Flight time: 0 hours in all; 0 in this make and model
- Last flight review: September 22, 2022
- Medical certificate: BasicMed
- Seat: rear
- Injury: minor injuries
The aircraft
- Airframe total time: 5,833.7 hours
- Last inspection: annual inspection, October 1, 2022; 7 hours since
- Maximum gross weight: 2,810 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming R680-17 (piston); 3,614 hours total
The flight
- Departed from: U64 Monticello UT at 4:30 pm
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 080° at 6 knots
- Visibility: 10 statute miles
- Sky: overcast at 3,400 ft; clear
- Temperature: 64°F (18°C), dew point 50°F (10°C)
- Altimeter: 30.20 inHg
- Observation at 11:15 am from KBDG, 21 miles away
Weather report (METAR): KBDG 131715Z AUTO 08006KT 10SM OVC034 18/10 A3020 RMK AO2 T01840098
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
6 documents, released by the NTSB on March 5, 2025. 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, 11 pages | View Download |
| 2 | Memorandum for Record A�� Telephone Interview, Pilot | PDF, 1 page | View Download |
| 3 | Exam Report - NTSB | PDF, 3 pages | View Download |
| 4 | FAA Special Airworthiness Information Bulletin (CE-09-35) Carburetor Icing Prevention | PDF, 3 pages | View Download |
| 5 | Release of Aircraft Wreckage, NTSB Form 6120.15 | PDF, 2 pages | View Download |
| 6 | Photos | PDF, 2 pages | 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.