Sikorsky H34-G accident near Walterboro, South Carolina, December 1, 1993
On December 1, 1993 at about 8:25 pm local time, a Sikorsky H34-G (helicopter), registered N8503J, was substantially damaged in an accident near Walterboro, South Carolina. It was an other work-use flight under external-load helicopter rules (Part 133). 1 person had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The seizure of the aircraft throttle to engine linkage for unknown reasons.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- December 1, 1993 · about 8:25 pm local time
- Place
- Walterboro, South Carolina · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Sikorsky H34-G
- Registration
- N8503J · registry record · serial 138471
- Damage
- Substantial damage
- Flight
- Other work-use flight · external-load helicopter rules (Part 133)
The NTSB's narrative final · quoted from the NTSB record
THE HELICOPTER WAS CONDUCTING LONG LINE EXTERNAL LOGGING OPERATIONS. THE PILOT STATED THAT HE WAS AT A HOVER, WITHOUT A LOAD, AND THE AIRCRAFT THROTTLE SEIZED AT ABOUT HALF THROTTLE. HE EXECUTED A FORCED LANDING INTO A GROUP OF TREES, AND THE AIRCRAFT RECEIVED SUBSTANTIAL DAMAGE. INSPECTION OF THE THROTTLE AND THROTTLE LINKAGE TO THE ENGINE DID NOT REVEAL ANY MALFUNCTION.
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: rotorcraft: helicopter
- Flight time: 7,800 hours in all; 1,000 in this make and model; 40 in the last 90 days; 25 in the last 30 days; 7,500 as pilot in command; 100 on instruments
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: rgt
The aircraft
- Airframe total time: 6,203 hours
- Last inspection: annual inspection, December 10, 1992; 319 hours since
- Maximum gross weight: 12,500 lb
- Seats: 1
- Landing gear: fixed
- Engine: Curtis Wright 989C9HE2 (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 040° at 9 knots
- Visibility: 15 statute miles
- Sky: scat at 25,000 ft
- Temperature: 57°F (14°C), dew point 39°F (4°C)
- Altimeter: 30.00 inHg
- Observation at 8:52 pm from CHS, 45 miles away
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.
Other NTSB records under N8503J the same tail number, which may have belonged to a different aircraft at the time
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.