Grumman-Schweizer G-164B accident near Holden, Utah, July 8, 1989
On July 8, 1989 at about 12:50 pm local time, a Grumman-Schweizer G-164B, registered N6754Q, was substantially damaged in an accident near Holden, Utah. It was an aerial application (crop spraying) flight under agricultural flying rules (Part 137). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
THE PILOT'S MISJUDGEMENT OF THE EFFECT OF HIGH DENSITY ALTITUDE ON A HEAVILY LOADED AIRCRAFT.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 8, 1989 · about 12:50 pm local time
- Place
- Holden, Utah · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman-Schweizer G-164B
- Registration
- N6754Q · registry record · serial 265B
- 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 SAID HE WAS APPROACHING THE POTATO FIELD TO BE SPRAYED AND WAS OVER A GRAIN FIELD WHEN THE AIRCRAFT BEGAN TO SETTLE. HE SAID HE DECIDED TO DUMP THE LOAD OF FERTILIZER BUT BY THAT TIME THE WHEELS WERE IN THE GRAIN AND HE REDUCED POWER AND LANDED. ABOUT 100 FEET AFTER TOUCHDOWN THE LEFT MAIN LANDING GEAR BROKE OFF AND THE AIRCRAFT SETTLED ONTO THE WING WHICH WAS DAMAGED. THE DENSITY ALTITUDE AT THE TIME WAS 7500 FEET.
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: single-engine land
- Flight time: 10,000 hours in all; 5,500 in this make and model; 150 in the last 90 days
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Airframe total time: 3,070 hours
- Last inspection: annual inspection, June 15, 1989; 70 hours since
- Maximum gross weight: 6,400 lb
- Seats: 1
- Landing gear: fixed
- Engine: P&W R-985 (piston); 0 hours total
The flight
- Departed from: NONE at 12:45 pm
- Destination: NONE
- Flight plan: none
- Runway 0
Weather at the time
- Light: dawn
- Wind: from 090° at 4 knots
- Visibility: 50 statute miles
- Sky: clear
- Temperature: 81°F (27°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 N6754Q the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number DEN89LA160.