Sikorsky S76 accident near Cheonwangbong, Kr, May 1, 2020
On May 1, 2020 at about 12:06 pm local time, a Sikorsky S76 (helicopter), registered HL9646, was substantially damaged in an accident near Cheonwangbong. It was flown under rules the NTSB did not record. The NTSB record does not give the injuries.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 1, 2020 · about 12:06 pm local time
- Place
- Cheonwangbong, South Korea
- Type
- Accident
- Injuries
- The NTSB record does not give the injuries.
- Weather
- not recorded
- Aircraft
- Sikorsky S76 B · all S76s on the register
- Registration
- HL9646 · no longer on the register
- Damage
- Substantial damage
- Flight
- Flight · rules the NTSB did not record
The NTSB's narrative preliminary · quoted from the NTSB record
The government of Korea, Republic Of has notified the NTSB of an accident involving a SIKORSKY S76 helicopter that occurred on May 01, 2020. The NTSB has appointed a U.S. Accredited Representative to assist the government of Korea, Republic Of's investigation under the provisions of ICAO Annex 13.All investigative information will be released by the government of Korea, Republic Of.
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
What happened, in order
- Unknown or undetermined during unknown defining event
The aircraft
- Landing gear: fixed
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The NTSB has not released the docket for this case yet. The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), is usually released when the investigation is nearly complete, and the list here is refreshed when it appears. Check 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.