- Date
- April 13, 2026, 10:51 local (17:51 UTC)
- Place
- Williams, CA
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N77UKAlexander Schleicher ASH 31 MI
- Defining event
- Initial climb: Loss of engine power (total)
- Weather
- Visual (VMC) · Day
- Status
- Investigation ongoing
- Investigation class
- Class 3
- NTSB office
- Western Pacific Region
- Parties
- FAA
- FAA report
- 20260413003419A
- Case key
- 202810
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 April 13, 2026, about 1051 Pacific standard time, an experimental Alexander Schleicher GMBH and Co., Ash 31 Mi Glider, N77UK, was substantially damaged when it was involved in an accident near Williams, California. The pilot sustained minor injuries. The glider was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that he departed from Williams Gliderport (CN12), Williams, California, in the self-launching motorglider. During climbout, about 200 ft above ground level, the engine lost power. The pilot verified that the emergency fuel pump was on and then reviewed his landing options. There were power lines straight ahead, so he opted to perform a right turn back to the runway. However, during the turn, the right wingtip struck terrain. Subsequently, the glider’s nose and main gear impacted a plowed field and resulted in substantial damage to the fuselage and wings. Witnesses located at the airport reported observing the glider depart uneventfully until it passed behind a hangar and was no longer visible. Shortly thereafter, the witnesses observed the glider again in a steep right turn. The glider was recovered 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
- N77UK
- Reported as
- Alexander Schleicher ASH 31 MI
- Category
- Glider
- Serial number
- 31088
- Built
- 2013
- Airframe hours
- 1,060
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Condition · February 17, 2026
- Destination
- Same as departure
- Airport
- CN12 · Williams Gliderport, runway 34, 2,500 × 40 ft, asphalt
- Equipment
- None
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
- 350° at 9 knots
- Visibility
- 10 statute miles
- Temperature
- 61 °F, dew point 46 °F
- Altimeter
- 30.11 inHg
- Observed at
- KBAB, 33 nm away
- METAR
- METAR KBAB 131755Z 35009KT 10SM SCT024 16/08 A3011 RMK AO2A SLP199 T01570075 10157 20078 51006 $
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.