Grumman G-164 accident near Mohave Valley, Arizona, September 23, 1989
On September 23, 1989 at about 5:00 pm local time, a Grumman G-164, registered N8790H, was substantially damaged in an accident near Mohave Valley, Arizona. It was a flight of an unrecorded kind under agricultural flying rules (Part 137). No one was hurt; 1 person was on board or involved. The weather was conditions the NTSB did not record.
The NTSB's probable cause their words, unchanged
A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 23, 1989 · about 5:00 pm local time
- Place
- Mohave Valley, Arizona · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- conditions the NTSB did not record
- Aircraft
- Grumman G-164 · all G-164s on the register
- Registration
- N8790H · no longer on the register
- Damage
- Substantial damage
- Flight
- Flight of an unrecorded kind · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
THE PILOT EXPERIENCED A LOSS OF POWER DURING TAKEOFF AND ATTEMPTED AN OFF-AIRPORT LANDING. THE AIRCRAFT CONTACTED AN IRRIGATION DITCH AND FLIPPED OVER. ATTEMPTS TO CONTACT THE PILOT/OPERATOR WERE UNSUCCESSFUL.
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
- Flight time: 1,000 hours in all
- Medical certificate: Unknown
- Seat: frt
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 5,200 lb
- Seats: 1
- Landing gear: fixed
- Engine: P&W R-1340-AN1 (piston); 0 hours total
- Not recorded
The flight
- Flight plan: not recorded
- Runway 0
Weather at the time
- Light: daylight
- Sky: not recorded; not recorded
- 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.
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.