Cessna U206B accident near Grass Valley, California, August 3, 1982
On August 3, 1982 at about 9:10 pm local time, a Cessna U206B, registered N4991F, was substantially damaged in an accident near Grass Valley, California (Nevada County Airpark airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was 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
- August 3, 1982 · about 9:10 pm local time
- Place
- Grass Valley, California · Nevada County Airpark · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna U206B · all U206Bs on the register
- Registration
- N4991F · registry record · serial U206-0691
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
DURING ARRIVAL, THE PILOT ENTERED THE TRAFFIC PATTERN TO LAND ON RUNWAY 25 WITH A REPORTED WIND FROM THE SOUTHWEST AT 10 KTS. ON HIS FIRST APPROACH, THE PILOT EXPERIENCED A ROUGH RIDE WITH FLUCTUATING AIRSPEED AND RATE OF DESCENT. HE WAS OVERSHOOTING SO HE MADE A GO-AROUND. AFTER A SECOND APPROACH, THE AIRCRAFT TOUCHED DOWN AND STARTED A ROLL-OUT. THE PILOT REPORTED THAT THE PLANE THEN BECAME AIRBORNE AGAIN, AS IF IT HAD ENCOUNTERED A GUST OR WIND SHEAR. SUBSEQUENTLY, THE AIRCRAFT LANDED HARD, SHEARING OFF THE NOSE GEAR.
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: single-engine land
- Flight time: 244 hours in all; 56 in this make and model; 187 as pilot in command
- Medical certificate: Class 3 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 27 hours since
- Maximum gross weight: 3,600 lb
- Seats: 6
- Landing gear: fixed
- Engine: Continental IO-520A (piston); 0 hours total
The flight
- Departed from: MMH Mammoth Lakes CA at 1:10 pm
- Destination: Grand Canyon AZ
- Flight plan: VFR
- Runway 25, 3,920 ft by 50 ft
Weather at the time
- Light: daylight
- Wind: from 225° at 10 knots
- Visibility: 15 statute miles
- Sky: not recorded; clear
- Temperature: 176°F (80°C), dew point 0°F (-18°C)
- Altimeter: 29.00 inHg
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 N4991F 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.