- Date
- July 24, 1994, 10:00 local (15:00 UTC)
- Place
- Stillwater, OK
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N923SBLet L-23
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 24, 1995
- Report
- Approved by Office Director
- FAA report
- 19940724019249A
- Case key
- 19123
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The certified flight instructor's failure to maintain flying speed.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
During an instructional flight, a glider was being towed by a car as part of the student pilot's qualification. After separation from the towing vehicle, the instructor pilot noticed that the glider was not gaining airspeed. The aircraft then stalled and struck the ground.
Factual narrative
On July 24, 1994, approximately 1000 central daylight time, a Let L-23 glider, N923SB, was substantially damaged during take- off. The instructor pilot and his student were not injured. Visual meteorological conditions prevailed for the 14 CFR 91 flight.
During an interview conducted by a Federal Aviation Administration inspector, the instructor pilot reported that the glider was being towed by car for takeoff as part of a student qualification. After separation from the towing vehicle the instructor pilot felt that they were not gaining airspeed and stalled. The glider struck the ground resulting in structural damage.
Aircraft
- Registration
- N923SB
- Reported as
- Let L-23
- Category
- Glider, amateur-built
- Serial number
- 917923
- Engine
- unknown
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Registered owner
- Cimmaron Soaring
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.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Unknown
- Flight hours
- 11,200 total
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 220° at 9 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 91 °F, dew point 64 °F
- Altimeter
- 30.00 inHg
- Observed at
- OKC, 30 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.