# NTSB WPR26LA057: Porto Risen SV, N817D, Carson City, NV, December 13, 2025 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: December 13, 2025, 10:21 local (18:21 UTC) - Place: Carson City, NV - Coordinates: 39.192269, -119.73466 - Nearby events: https://openairdocs.org/map.md?lat=39.1923&lon=-119.7347&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Landing gear not configured](https://openairdocs.org/ntsb-events/095) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report March 13, 2026 - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: FAA - NTSB case key (mKey): 202158 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR26LA057 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/202158/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=202158 - Page: https://openairdocs.org/ntsb/WPR26LA057 ## Probable cause The pilot's failure to extend the landing gear prior to landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Action: forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [William James Dally RISEN SV, 1 case](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=05642MQ), [All aircraft, 440 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md) - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Not used/operated (probable cause); cases with it: [William James Dally RISEN SV, 1 case](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=05642MQ), [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [William James Dally RISEN SV, 1 case](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=05642MQ), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Landing gear not configured](https://openairdocs.org/ntsb-events/095) (defining event); cases with it: [William James Dally RISEN SV, 1 case](https://openairdocs.org/ntsb-events/095/sequence.md?model=05642MQ), [All aircraft, 584 cases](https://openairdocs.org/ntsb-events/095/sequence.md) ## Analysis The pilot was conducting a maintenance test flight and had conducted several landings, all of which were uneventful. During the final approach to land, he thought he had lowered the landing gear but did not confirm whether the gear-down advisory lights were illuminated. He subsequently landed the airplane with the landing gear retracted, which resulted in substantial damage to the lower fuselage composite structure. The pilot reported no pre-accident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot added that the LED gear-down advisory lights were not very bright and that sunlight made them difficult to see. ## Aircraft - Registration: [N817D](https://openairdocs.org/aircraft/N817D), registered now, S/N 46, built 2024 (OpenAirDocs) - Reported make and model: PORTO Risen SV - Registry model: [William James Dally RISEN SV](https://openairdocs.org/model/william-james-dally-risen-sv) (registry code 05642MQ) (OpenAirDocs) - Registry engine: [Rotax 916 IS series](https://openairdocs.org/engine/rotax-916-is-series) (registry code 55622, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 46 - Year built: 2025 - Airframe hours: 58 - Engines: Rotax 916 IS 160 horsepower reciprocating - Damage: Substantial damage - Flight: Flight test, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Unknown, May 23, 2025, 58 hours before - Departed: KCXP, Carson City, NV - Destination: KCXP, Carson City, NV - Airport: CXP, Carson City, runway 09/27, 6,101 × 75 ft, asphalt - Equipment: Airframe parachute, Angle of attack indicator, Auto-pilot, Data recorder, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display, Stall warning system, Onboard weather, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review March 31, 2025; seat: left; restraint: 4-point; flight hours: 3,877 total, 59 in this make and model, 3,790 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 41 °F, dew point 21 °F - Altimeter: 30.41 inHg - Observed at: KCXP, 1 nm away - METAR: METAR KCXP 131835Z AUTO 00000KT 10SM CLR 05/M06 A3028 RMK AO2 ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 20251213020019I](https://openairdocs.org/incident/20251213020019I), Dec 13, 2025: William James Dally RISEN SV, Carson City, NV, Substantial damage. The aircraft suffered a gear-up landing at Carson City Airport (kcxp) on Saturday, December 13, 2022. This office was notified on Monday, December 15, 2022.… ## Docket (2 files) The files NTSB released with the investigation on March 13, 2026, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=202158. 2.2 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 10 pages, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19726812&FileExtension=pdf&FileName=r_6120_1_Form-WPR26LA057_Redacted-Rel.pdf - Photos (item 2, PDF, 7 pages, 6 photos, 498 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19922868&FileExtension=pdf&FileName=Photo%20Array%20-%20WPR26LA057-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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.