Grumman-Schweizer G-164A accident near Parowan, Utah, September 27, 2001
On September 27, 2001 at about 3:00 pm local time, a Grumman-Schweizer G-164A, registered N9925, was substantially damaged in an accident near Parowan, 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).
The NTSB's probable cause their words, unchanged
the pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall/mush into terrain. Contributing factors were the pilot's diverted attention, the rising terrain, and the high density altitude weather condition.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 27, 2001 · about 3:00 pm local time
- Place
- Parowan, 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-164A
- Registration
- N9925 · no longer on the register · serial 1331
- 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 that he completed an application pass, and turned his head to look for his flagman. He said there was rising terrain in front of him, and he immediately applied full power. The airplane began losing airspeed, and he was unable to increase the climb rate. The airplane impacted the ground in a rough ravine. The left wing spar was bent up and the fuselage was wrinkled. The calculated density altitude was 9,736 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; instrument: airplane; rotorcraft: glider
- Flight time: 1,692 hours in all; 250 in this make and model; 160 in the last 90 days; 21 in the last 30 days; 1,530 as pilot in command
- Last flight review: November 15, 2000
- Medical certificate: Class 2
- Seat: frt
- Injury: no injuries
The aircraft
- Airframe total time: 7,426 hours
- Last inspection: annual inspection, June 1, 2001; 49 hours since
- Maximum gross weight: 4,500 lb
- Seats: 1
- Landing gear: fixed
- Engine: Continental R-975-46A GA2 (piston); 0 hours total
The flight
- Departed from: 1L9 Parowan UT at 2:30 pm
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: at 0 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 59°F (15°C), dew point 43°F (6°C)
- Altimeter: 30.19 inHg
- Observation at 2:53 pm from CDC, 15 miles away
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 N9925 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.