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Accidents · NTSB WPR26LA022 · Preliminary: the investigation is not finished

Flight Design GMBH CTSW accident near Casa Grande, Arizona, October 17, 2025

On October 17, 2025 at about 8:20 pm local time, a 2006 Flight Design GMBH CTSW, registered N531CT, was substantially damaged in an accident during enroute near Casa Grande, Arizona (Casa Grande Municipal 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

The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.

Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.

What the record shows

Date
October 17, 2025 · about 8:20 pm local time · cases in 2025
Place
Casa Grande, Arizona · Casa Grande Municipal · cases near this airport · map
Type
Accident
Injuries
1 person had minor injuries.
Weather
visual conditions (good weather)
Aircraft
Flight Design GMBH CTSW NO SERIES, built 2006 · all CTSWs on the register
Registration
N531CT · registry record · serial 06-12-11
Damage
Substantial damage
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative preliminary · quoted from the NTSB record

On October 17, 2025, about 13:20 mountain standard time, a Flight Design GMBH CTSW, N531CT, was substantially damaged when it was involved in an accident near Casa Grande, Arizona. The pilot received minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91personal flight. The pilot reported that he sumped the fuel and found no water or contaminants, then verified 12 gallons of fuel on board by viewing the fuel sight tubes at the root of the overhead wings. The engine runup, departure and climb were uneventful. About 25 minutes into the flight the engine speed slowed unexpectedly and advancing the throttle did not change the engine speed. About 15 seconds later the engine lost total power. The pilot attempted three restarts. During the first restart, the engine started and ran normally for about 5 to 10 seconds then lost total power. During the second restart, the engine ran with partial power for about 5 to 10 seconds followed by a total loss of power. The engine did not start on the third attempt. The pilot maneuvered toward the destination airport and transmitted a mayday call over the radio. The pilot realized that there was insufficient altitude to reach the airport and performed an off-airport landing on desert scrub. Upon touchdown the airplane nosed-over which substantially damaged the fuselage and rudder assembly. The pilot exited the airplane unassisted. The airplane was recovered to a secure facility for further examination.

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

  1. Loss of engine power (partial) during enroute defining event

The aircraft

  • Airframe total time: 505 hours
  • Last inspection: annual inspection, October 31, 2024
  • Maximum gross weight: 1,320 lb
  • Seats: 2
  • Landing gear: fixed

The flight

  • Departed from: FFZ Mesa AZ at 7:44 pm
  • Destination: RYN Tucson AZ
  • Flight plan: none
  • Runway 5, 5,200 ft by 100 ft

Weather at the time

  • Light: daylight
  • Wind: from 290° at 7 knots
  • Visibility: 10 statute miles
  • Sky: clear
  • Temperature: 77°F (25°C), dew point 45°F (7°C)
  • Altimeter: 29.91 inHg
  • Observation at 12:56 pm from CGZ, 3 miles away

Weather report (METAR): METAR KCGZ 171956Z AUTO 29007KT 10SM CLR 25/07 A2991 RMK AO2 SLP120 T02500067 PNO $=

Injuries

FatalSeriousMinorNone
Flight crew1

Documents from the investigation the NTSB's docket: the evidence folder behind the report

The NTSB has not released the docket for this case yet. The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), is usually released when the investigation is nearly complete, and the list here is refreshed when it appears. Check at the NTSB.

Connections how this case links to the rest of the register

Aircraft
Place

The whole map of how records connect · these connections as data: /graph/accident/WPR26LA022.json.

The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.

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 does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.