Cessna 421B accident near Rock Sound, Bs, June 5, 2018
On June 5, 2018 at about 8:15 pm local time, a 1974 Cessna 421B, registered N421MM, was destroyed in an accident during initial climb near Rock Sound (Rock Sound airport). It was flown under non-U.S. private rules. 3 people were killed. The weather was conditions the NTSB did not record.
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
- June 5, 2018 · about 8:15 pm local time
- Place
- Rock Sound, Bahamas · Rock Sound · map
- Type
- Accident
- Injuries
- 3 people were killed.
- Weather
- conditions the NTSB did not record
- Aircraft
- Cessna 421B B, built 1974 · all 421Bs on the register
- Registration
- N421MM · no longer on the register · serial 421B0804
- Damage
- Destroyed
- Flight
- Flight · non-U.S. private rules
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Fire/smoke (non-impact) during initial climb defining event
- Loss of control in flight during emergency descent
- Collision with terrain or object (not controlled flight into terrain) during uncontrolled descent
The aircraft
- Maximum gross weight: 7,449 lb
- Seats: 6
- Landing gear: retractable
- Operator: Hat Investments LLC
The flight
- Departed from: MYER Rock Sound at 8:10 pm
- Destination: KFRP Fort Pierce FL
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 2 |
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.