Grumman-Schweizer G-164B accident near Lamont, Washington, July 23, 2006
On July 23, 2006 at about 2:45 pm local time, a Grumman-Schweizer G-164B, registered N8376K, was substantially damaged in an accident near Lamont, Washington. It was an aerial application (crop spraying) flight under agricultural flying rules (Part 137). 1 person had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot's failure to maintain terrain clearance while maneuvering.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 23, 2006 · about 2:45 pm local time
- Place
- Lamont, Washington · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman-Schweizer G-164B
- Registration
- N8376K · no longer on the register · serial 675B
- Damage
- Substantial damage
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
The pilot of the agricultural airplane reported that he was spraying a field adjacent to a set of hills, which required him to maneuver over the hills. While turning, he "misjudged the height of the hills at one point." He did not maintain terrain clearance, and the airplane impacted the ground.
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: commercial pilot
- Ratings: multi-engine land; single-engine land; single-engine sea; instrument: airplane
- Flight time: 12,000 hours in all; 10,000 in this make and model; 120 in the last 90 days; 40 in the last 30 days
- Medical certificate: Class 2
- Injury: minor injuries
The aircraft
- Landing gear: fixed
- Engine: Pratt & Whitney R-1340 (piston); 0 hours total
The flight
- Departed from: 33S Ritzville WA
- Destination: 33S
- Flight plan: none
Weather at the time
- Light: daylight
- Temperature: 0°F (-18°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 N8376K 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.