# NTSB ANC25LA107: David Hunter Danchini CUB, N798AK, Tyonek, AK, September 16, 2025

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: September 15, 2025, 19:30 local (Sep 16, 2025, 03:30 UTC)
- Place: Tyonek, AK
- Coordinates: 61.234905, -151.78733
- Nearby events: https://openairdocs.org/map.md?lat=61.2349&lon=-151.7873&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 21, 2026
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Alaska Regional Office
- Parties: FAA FSDO
- NTSB case key (mKey): 201017
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC25LA107
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/201017/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=201017
- Page: https://openairdocs.org/ntsb/ANC25LA107

## Probable cause

The pilot’s failure to maintain directional control of the airplane during the landing roll, in gusting crosswind conditions.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [David Hunter DANCHINI CUB, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05642P9), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [David Hunter DANCHINI CUB, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=05642P9), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Wind: windshear](https://openairdocs.org/ntsb-findings/03034020): Environmental issues › Conditions/weather/phenomena · Effect on operation (probable cause); cases with it: [David Hunter DANCHINI CUB, 1 case](https://openairdocs.org/ntsb-findings/03034020/cases.md?model=05642P9), [All aircraft, 90 cases](https://openairdocs.org/ntsb-findings/03034020/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [David Hunter DANCHINI CUB, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05642P9), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)

## Analysis

The pilot reported that, during the landing roll while performing an off-airport landing in a tailwheel-equipped airplane, the airplane encountered a wind gust from the left. The airplane ground looped to the right and subsequently nosed over, which resulted in substantial damage to the left wing lift strut, vertical stabilizer, and rudder. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N798AK](https://openairdocs.org/aircraft/N798AK), registered now, S/N 007, built 2024 (OpenAirDocs)
- Reported make and model: DAVID HUNTER DANCHINI CUB
- Registry model: [David Hunter DANCHINI CUB](https://openairdocs.org/model/david-hunter-danchini-cub) (registry code 05642P9) (OpenAirDocs)
- Registry engine: [Lycoming O-320-B2B](https://openairdocs.org/engine/lycoming-o-320-b2b) (registry code 42138, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 007
- Year built: 2024
- Airframe hours: 102.9
- Engines: Lycoming O-320-B2B 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Special, Experimental (Special); Standard, Utility
- Last inspection: Condition, August 5, 2025
- Departed: Tyonek, AK
- Destination: Same as departure
- Flight plan: VFR
- Airport: NONE
- Equipment: Electronic primary flight display, Electronic multifunction display, Angle of attack indicator, ADS-B, Onboard weather

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 60; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review August 5, 2023; seat: front; restraint: 4-point; flight hours: 622.8 total, 616.2 in this make and model, 616.2 as pilot in command, 30 in the last 90 days, 15 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: 10,000 ft overcast
- Temperature: 55 °F, dew point 43 °F
- Altimeter: 29.49 inHg
- Observed at: PAEN, 42 nm away
- METAR: PAEN 160253Z 01010KT 10SM OVC100 13/06 A2949 RMK AO2 SLP989 T01330056 56010

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20250916019019A](https://openairdocs.org/incident/20250916019019A), Sep 16, 2025: David Hunter DANCHINI CUB, Beluga, AK, Substantial damage. On September 16 2025 at approximately 1900 hours a PA18 aircraft became inverted on the ground after the pilot lost control during landing. Landing was…

## Docket (2 files)

The files NTSB released with the investigation on May 22, 2026, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=201017. 4.0 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 10 pages, 3.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19353118&FileExtension=pdf&FileName=ANC25LA107%206120_Redacted-Rel.pdf
- Photos (item 2, PDF, 2 pages, 119 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19352868&FileExtension=pdf&FileName=ANC25LA107%20Photos-Rel.pdf

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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