Johnson Revolution Mini 500 accident near Isabela, Puerto Rico, February 12, 2005
On February 12, 2005 at about 8:40 pm local time, a Johnson Revolution Mini 500 (helicopter), an amateur-built aircraft,, registered N38DJ, was substantially damaged in an accident near Isabela, Puerto Rico. It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The loss of engine power during cruise flight for an undetermined reason, which resulted in an autorotation and collision with terrain.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- February 12, 2005 · about 8:40 pm local time
- Place
- Isabela, Puerto Rico · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Johnson Revolution Mini 500, amateur-built
- Registration
- N38DJ · no longer on the register · serial 321
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot was conducting a personal flight in a single-seat experimental helicopter under 14 CFR Part 91 when the helicopter had a loss of engine power. The pilot entered an autorotation to a construction site, and during the approach to land, he had to maneuver away from power lines. After clearing the power lines, the rotor rpm was too low to flare the helicopter, and it impacted the ground. The pilot said due to the extensive damage, he was not able to determine why the engine lost power.
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: private
- Ratings: rotorcraft: helicopter
- Flight time: 142 hours in all; 51 in this make and model
- Last flight review: March 1, 2004
- Medical certificate: Class 3 (without waivers/limitations)
- Seat: frt
- Injury: minor injuries
The aircraft
- Airframe total time: 125 hours
- Last inspection: condition inspection, February 1, 2005; 0 hours since
- Maximum gross weight: 840 lb
- Seats: 1
- Landing gear: fixed
- Engine: Rotax 582 (piston); 0 hours total
The flight
- Departed from: Vega Baja PR at 8:40 pm
- Flight plan: none
Weather at the time
- Light: daylight
- Visibility: 20 statute miles
- Sky: clear
- Temperature: 70°F (21°C), dew point 0°F (-18°C)
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 N38DJ 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.