- Date
- October 17, 2025, 13:20 local (20:20 UTC)
- Place
- Casa Grande, AZ
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N531CTFlight Design Ctsw
- Defining event
- Enroute: Loss of engine power (partial)
- Weather
- Visual (VMC) · Day
- Status
- Investigation ongoing
- Investigation class
- Class 3
- NTSB office
- Western Pacific Region
- Parties
- Federal Aviation Administration
- FAA report
- 20251017017319A
- Case key
- 201895
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Preliminary report
What NTSB knew early in the investigation. It may change in the final report.
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.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Aircraft
- Registration
- N531CT
- Reported as
- Flight Design Ctsw (NO SERIES)
- Category
- Airplane
- Serial number
- 06-12-11
- Built
- 2006
- Airframe hours
- 505
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · October 31, 2024
- Departed
- FFZ · Mesa, AZ
- Destination
- RYN · Tucson, AZ
- Airport
- CGZ · Casa Grande Municipal, runway 5, 5,200 × 100 ft, concrete
- Equipment
- ADS-B, Stall warning system, Onboard weather, Airframe parachute, Handheld GPS, Electronic primary flight display, Electronic multifunction display, Auto-pilot, Electronic flight bag or handheld device
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 290° at 7 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 77 °F, dew point 45 °F
- Altimeter
- 29.91 inHg
- Observed at
- CGZ, 3 nm away
- METAR
- METAR KCGZ 171956Z AUTO 29007KT 10SM CLR 25/07 A2991 RMK AO2 SLP120 T02500067 PNO $=
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.