Grumman-Schweizer G-164A accident near Tallulah, Louisiana, July 21, 2005
On July 21, 2005 at about 4:30 pm local time, a Grumman-Schweizer G-164A, registered N8891H, was substantially damaged in an accident near Tallulah, Louisiana. 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 partial loss of engine power as result of the fracture of the number five-cylinder exhaust valve rocker arm mounting boss. A contributing factor was the lack of suitable terrain for the forced landing.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 21, 2005 · about 4:30 pm local time
- Place
- Tallulah, Louisiana · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman-Schweizer G-164A
- Registration
- N8891H · no longer on the register · serial 1561
- Damage
- Substantial damage
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
At the completion of an east to west spray pass over a field, the bi-wing agricultural airplane's engine experienced a loss of power and exhibited an unusual vibration. The 2,697-hour private pilot turned the airplane in a southerly direction in an attempt to fly back to the originating airport. Realizing that the engine was not developing sufficient power to return to the airport, the pilot turned the airplane approximately 180-degrees towards a road that he thought would make a suitable landing area. Before the pilot could reach the road, the engine started making "popping" noises, trailing smoke, and experienced a further reduction of power. The pilot then elected to land in a cotton field. During the landing roll the left main landing gear collapsed and the airplane nosed over coming to rest in an inverted position. An examination of the engine revealed the number five-cylinder exhaust valve rocker arm mounting boss was fractured approximately 180 degrees around its circumference. This fracture allowed the exhaust valve to remain closed.
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: private
- Ratings: single-engine land
- Flight time: 2,697 hours in all; 1,750 in this make and model; 7 in the last 90 days; 7 in the last 30 days
- Medical certificate: Class 3
- Seat: ctr
The aircraft
- Airframe total time: 5,091 hours
- Last inspection: annual inspection, March 1, 2005; 4 hours since
- Landing gear: fixed
- Engine: Pratt & Whitney R-1340-AN-1 (piston); 0 hours total
The flight
- Departed from: 9LS5 Tallulah LA at 4:00 pm
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 290° at 5 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 208°F (98°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.