Piper PA-25-260 accident near Muskogee, Oklahoma, April 16, 1994
On April 16, 1994 at about 1:20 pm local time, a Piper PA-25-260, registered N4647Y, was substantially damaged in an accident near Muskogee, Oklahoma. 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 PILOT'S FAILURE TO MAINTAIN CLEARANCE WITH THE POWER LINE. FACTORS WERE A CHEMICAL SPRAY CONTAMINATED WINDSCREEN, THE RESULTANT LIMITATION TO VISIBILITY, AND SUN GLARE.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 16, 1994 · about 1:20 pm local time
- Place
- Muskogee, Oklahoma · map
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-25-260 · all PA-25-260s on the register
- Registration
- N4647Y · registry record · serial 25-4367
- Damage
- Substantial damage
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
DURING AN AGRICULTURE SPRAY RUN THE CHEMICAL PARTIALLY COVERED THE WINDSCREEN AND COMBINED WITH SUN GLARE, OBSCURED THE PILOT'S VISION. THE AIRCRAFT FLEW INTO A POWER LINE AND HOOKED THE TAIL WHEEL ON IT. THE AIRCRAFT IMPACTED THE GROUND NOSE GEAR FIRST.
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: multi-engine land; single-engine land
- Flight time: 13,400 hours in all; 6,500 in this make and model; 100 in the last 90 days; 40 in the last 30 days; 13,400 as pilot in command
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: ctr
The aircraft
- Airframe total time: 5,474 hours
- Last inspection: annual inspection, March 1, 1994; 100 hours since
- Maximum gross weight: 2,900 lb
- Seats: 1
- Landing gear: fixed
- Engine: Lycoming O-540-G1A5 (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 270° at 4 knots, gusting 10
- Visibility: 10 statute miles
- Sky: clear at 12,000 ft
- Temperature: 46°F (8°C), dew point 41°F (5°C)
- Altimeter: 30.00 inHg
- Observation at 12:54 pm from TUL, 32 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.
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.