Grumman Acft Eng Cor-Schweizer G-164B accident near Covington, Oklahoma, June 6, 2013
On June 6, 2013 at about 6:25 pm local time, a Grumman Acft Eng Cor-Schweizer G-164B, registered N6754Q, was substantially damaged in an accident during maneuvering (low-alt flying) near Covington, Oklahoma (Cades 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).
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The NTSB's probable cause their words, unchanged
The airplane’s failure to climb after takeoff for reasons that could not be determined because postaccident examinations of the engine and airframe did not reveal any anomalies that would have precluded normal operation.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 6, 2013 · about 6:25 pm local time
- Place
- Covington, Oklahoma · Cades Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Grumman Acft Eng Cor-Schweizer G-164B · all G-164Bs on the register
- 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 stated that, after takeoff for an aerial application flight, the airplane was "a little sluggish" while he was maneuvering it about 30 feet above the ground. He stated that he was gently pulling back on the control stick when the airplane started to descend. He then advanced the throttle; however, the airplane continued to descend and then impacted terrain and flipped over. Postaccident examination of the engine and airframe did not reveal any anomalies that would have precluded normal operation. The pilot stated that the engine instruments did not indicate any power loss and that he topped off the fuel tanks before the flight. He also reported that the wind at the time of takeoff was about 5 knots with no gusts, and the atmospheric conditions were not conducive to the accumulation of carburetor ice. The airplane was below its maximum takeoff gross weight. The reason for the airplane's failure to climb could not be 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
What happened, in order
- Low altitude operation/event during maneuvering (low-alt flying) defining event
The NTSB's findings
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Climb rate › Not attained/maintained
Pilot
- Certificate: commercial pilot
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 990 hours in all; 103 in this make and model; 70 in the last 90 days; 35 in the last 30 days
- Last flight review: June 1, 2013
- Medical certificate: Class 2 (without waivers/limitations)
- Seat: ctr
- Injury: no injuries
The aircraft
- Last inspection: annual inspection
- Maximum gross weight: 5,200 lb
- Seats: 1
- Landing gear: fixed
- Engine: P&W R-985 SERIES (piston); 0 hours total
The flight
- Departed from: 0OK8 Covington OK at 6:24 pm
- Destination: 0OK8 Covington OK
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 100° at 10 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 81°F (27°C), dew point 55°F (13°C)
- Altimeter: 30.00 inHg
- Observation at 6:50 pm from WDG, 11 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight 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 CEN13LA322.