Schempp-Hirth VENTUS CM accident near Marfa, Texas, July 2, 1991
On July 2, 1991 at about 7:00 pm local time, a Schempp-Hirth VENTUS CM (glider), registered N9999R, was substantially damaged in an accident near Marfa, Texas (Marfa Municipal airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT MISJUDGED THE APPROACH. FACTORS WERE THE HIGH DENSITY ALTITUDE, THE DOWNDRAFT, AND THE DTERIORTED CLIMB PERFORMANCE.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 2, 1991 · about 7:00 pm local time
- Place
- Marfa, Texas · Marfa Municipal · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Schempp-Hirth VENTUS CM
- Registration
- N9999R · no longer on the register · serial 36
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PILOT OF THE MOTORIZED GILDER ENCOUNTERED A DOWNDRAFT FROM CONVECTIVE ACTIVITY DURING INITIAL CLIMB OUT FROM THE RUNWAY. THE GILDER WAS CLIMBING AT 150 TO 200 FEET PER MINUTE WAS 100 ABOVE GROUND WHEN IT STARTED TO DESCEND AT 200 FEET PER MINUTE. THE PILOT ATTEMPTED A LANDING IN AN OPEN FIELD, BUT STRUCK A FENCE DURING THE APPROACH. THE GLIDER WAS POWERED BY A TWO STROKE 25HP ENGINE AND WAS OPERATING WITH FULL WATER BALLAST AT MAXIMUM GROSS WEIGHT. THE DENSITY ALTITUDE WS ESTIMATED TO BE 9,000 FEET WHEN THE ACCIDENT OCCURRED. THE PILOT WAS A COMPETITOR IN THE NATIONAL MOTOR GLIDER COMPETITION.
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
Pilot
- Certificate: commercial pilot
- Ratings: single-engine land; rotorcraft: glider
- Flight time: 1,500 hours in all; 200 in this make and model; 12 in the last 30 days; 1,440 as pilot in command
- Medical certificate: Class 3 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 948 lb
- Seats: 1
- Landing gear: retractable
- Engine: Solo 235B (piston); 0 hours total
The flight
- Flight plan: none
- Runway 21, 5,300 ft by 150 ft
Weather at the time
- Light: daylight
- Wind: from 300° at 3 knots
- Visibility: 30 statute miles
- Sky: clear
- Temperature: 88°F (31°C), dew point 57°F (14°C)
- Altimeter: 30.00 inHg
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
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 never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.