Bell 47G-2 accident near Palmdale, California, May 2, 1986
On May 2, 1986 at about 2:10 am local time, a Bell 47G-2 (helicopter), registered N4239J, was substantially damaged in an accident near Palmdale, California (Palmdale airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
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 2, 1986 · about 2:10 am local time
- Place
- Palmdale, California · Palmdale · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Bell 47G-2 · all 47G-2s on the register
- Registration
- N4239J · no longer on the register · serial 1
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE HELICOPTER LANDED HARD IN THE DESERT WHILE ON A VFR PERSONAL FLT. THE PLT INDICATED THAT HE JUST DEPARTED A MOUNTIAN AREA FOR REFUELING. HE ALSO INDICATED HE WAS DISORIENTED AND THE COMPASS WAS INOPERABLE. HE DECIDED TO LAND AND CHECK THE FUEL QUANTITY. HE STATED HE MISJUDGED THE LANDING, THE TAIL HIT THE DESERT FLOOR AND THE MAIN ROTOR STRUCK AND SEVERED THE TAIL BOOM. APRX 1 QUART OF FUEL WAS DRAINED FROM THE ENTIRE FUEL SYSTEM. ACCORDING TO THE MANUFACTURERS OPERATORS MANUAL FOR THE BELL 47G, THE FUEL CAPACITY IS 43 GALLONS TOTAL WITH 41 GALLONS USABLE.
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: flight instructor, commercial pilot, private
- Ratings: single-engine land; instructor: helicopter; rotorcraft: helicopter
- Flight time: 1,943 hours in all; 1,538 in this make and model; 90 in the last 90 days; 1,870 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 12,211 hours
- Last inspection: 100-hour inspection, April 17, 1986; 10 hours since
- Maximum gross weight: 2,490 lb
- Seats: 3
- Landing gear: fixed
- Engine: Franklin 6VS-335-A (piston); 0 hours total
The flight
- Departed from: PMD Palmdale CA at 11:30 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 260° at 11 knots
- Visibility: 35 statute miles
- Sky: scat at 16,000 ft
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
- Altimeter: 30.00 inHg
- Observation at 5:46 pm from PMD, 8 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.
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.