Amateur-built THORP T-18 accident near Walterboro, South Carolina, October 19, 1991
On October 19, 1991 at about 5:00 pm local time, a amateur-built THORP T-18, registered N27DW, was substantially damaged in an accident near Walterboro, South Carolina (Walterboro Municipal airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE STUDENT PILOT'S IMPROPER USE OF THE WHEEL BRAKES, AND THE SUBSEQUENT LOSS OF DIRECTIONAL CONTROL. FACTORS IN THIS ACCIDENT WERE THE STUDENT PILOT'S LACK OF TOTAL FLYING EXPERIENCE AND THE PILOT-IN-COMMAND'S INADEQUATE SUPERVISION OF THE FLIGHT.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- October 19, 1991 · about 5:00 pm local time
- Place
- Walterboro, South Carolina · Walterboro Municipal · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built THORP T-18
- Registration
- N27DW · registry record · serial 94
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE STUDENT PILOT WAS IN THE LEFT SEAT; HIS FATHER, A COMMERCIAL PILOT (NOT AN INSTRUCTOR), WAS IN THE RIGHT SEAT. WHEEL BRAKE PEDALS WERE INSTALLED ON THE LEFT SIDE ONLY. THE STUDENT WAS LANDING THE AIRPLANE. UPON TOUCHDOWN, THE TAIL WHEEL BEGAN TO SHIMMY, AND THE AIRPLANE DRIFTED TO THE SIDE OF THE RUNWAY. THE STUDENT APPLIED WHEEL BRAKES, HOWEVER, HE REPORTED THAT HIS RIGHT FOOT INADVERTENTLY PUSHED A FUEL TANK BRACE INSTEAD OF THE RIGHT BRAKE PEDAL. THE AIRPLANE DEPARTED THE RUNWAY TO THE LEFT SIDE, AND GROUND LOOPED. THERE WERE NO REPORTED MECHANICAL PROBLEMS WITH THE AIRPLANE PRIOR TO THE ACCIDENT
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: multi-engine land; single-engine land; instrument: airplane; rotorcraft: glider
- Flight time: 28,000 hours in all; 100 in this make and model; 60 in the last 90 days; 25 in the last 30 days; 28,000 as pilot in command
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: rgt
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 1,550 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-320-B (piston); 0 hours total
The flight
- Departed from: NONE Sheldon SC
- Flight plan: none
- Runway 23, 5,150 ft by 100 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 210° at 5 knots
- Visibility: 15 statute miles
- Sky: clear
- Temperature: 77°F (25°C), dew point 52°F (11°C)
- Altimeter: 30.00 inHg
- Observation at 4:50 pm from CHS, 30 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 2 |
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.