The government of Korea, Republic of, notified the NTSB of an accident involving a Sikorsky S76 helicopter. The incident took place on May 01, 2020, at Cheonwangbong, Korea, Republic of. The NTSB has appointed a U.S. Accredited Representative to support the investigation conducted by the Korean authorities under ICAO Annex 13. There were no injuries reported in this accident involving aircraft HL9646. All investigative details will be released by the government of Korea, Republic of.