Grumman G-164A accident near Sayre, Oklahoma, June 6, 2007
On June 6, 2007 at about 5:00 pm local time, a Grumman G-164A, registered N4673, was substantially damaged in an accident near Sayre, Oklahoma (Sayre Municipal Airport). 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 partial loss of engine power on takeoff-initial climb for an undetermined reason. A factor associated with the accident was the lack of suitable terrain for a forced landing.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 6, 2007 · about 5:00 pm local time
- Place
- Sayre, Oklahoma · Sayre Municipal Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman G-164A · all G-164As on the register
- Registration
- N4673 · no longer on the register · serial 1080
- 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 airline transport pilot departed in a single-engine, low-wing airplane for the purpose of aerial application. He reported that during takeoff, at approximately 100 feet above ground level (AGL), the engine lost partial power. He was unable to maintain altitude, and made a controlled descent into small trees off the end of the runway and then nosed over. An FAA inspector examined the airplane, and reported there was sufficient fuel on board for the flight and both water accumulators were empty. The airplane's last annual inspection was on March 21, 2007. At the time of inspection, the airplane had a total of 7,392 hours. The engine had 7,500 total hours, and 100 hours since it was last inspected. The cause for the partial loss of engine power was not determined.
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: airline transport pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane single-engine; instructor: glider; instrument: airplane; rotorcraft: glider
- Flight time: 9,957 hours in all; 150 in this make and model
- Medical certificate: Class 1 (with waivers/limitations)
- Seat: sngl
- Injury: no injuries
The aircraft
- Airframe total time: 7,392 hours
- Last inspection: annual inspection, March 1, 2007
- Maximum gross weight: 4,499 lb
- Seats: 1
- Landing gear: fixed
- Engine: Pratt & Whitney R-985 (piston); 0 hours total
The flight
- Departed from: 304 Sayre OK
- Destination: 304
- Flight plan: none
- Runway 017, 5,017 ft by 130 ft
Weather at the time
- Light: daylight
- Wind: from 225° at 5 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 90°F (32°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.