Piper PA25-235 accident near Somerton, Arizona, August 16, 1983
On August 16, 1983 at about 5:30 pm local time, a Piper PA25-235, registered N7104Z, was destroyed in an accident near Somerton, Arizona (Somerton airport). It was an aerial application (crop spraying) flight under agricultural flying rules (Part 137). 1 person was seriously injured. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 16, 1983 · about 5:30 pm local time
- Place
- Somerton, Arizona · Somerton · map
- Type
- Accident
- Injuries
- 1 person was seriously injured.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA25-235 · all PA25-235s on the register
- Registration
- N7104Z · no longer on the register · serial 25-2899
- Damage
- Destroyed
- Flight
- Aerial application (crop spraying) flight · agricultural flying rules (Part 137)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT COLLIDED WITH THE GROUND DURING A TURN IN TURBULENT AIR TO ABORT AN AERIAL APPLICATION MISSION BECAUSE OF WEATHER. THE PILOT STATED THAT HE HAD MADE TWO PASSES AT THE FIELD HE WAS SPRAYING WHEN HE NOTICED THE FLAGMAN AND FARMERS WAVING HIM OFF DUE TO AN APPROACHING THUNDERSTORM. AFTER DECIDING HE WAS SUPPOSED TO LEAVE THE PILOT STATED THATHE MADE A STANDARD RIGHT TURN TO THE NORTH AND ENCOUNTERED A WIND SHEAR. THE RIGHT WING WAS FORCED DOWN ALMOST INVERTED BEFORE CONTACT WITH THE GROUND. ACCORDING TO THE WITNESSES AFTER CIRCLING TO CONFIRM THE SIGNAL TO LEAVE THE ACFT BEGAN A RIGHT TURN, LOST ALT RAPIDLY AND CONTACTED THE GROUND RIGHT WING FIRST. THE YUMA, AZ WEATHER REPORT AT 1055 HOURS LISTS IN THE REMARKS SECTION CUMULONIMBUS CLOUDS MOVING SOUTHEAST TO NORTHWEST THROUGH THE NORTHWEST QUADRANT.
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; instrument: airplane
- Flight time: 3,698 hours in all; 2,000 in this make and model; 276 in the last 90 days; 70 in the last 30 days; 3,698 as pilot in command
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: ctr
The aircraft
- Last inspection: annual inspection
- Maximum gross weight: 2,900 lb
- Seats: 1
- Landing gear: fixed
- Engine: Lycoming O-540-B2B5 (piston); 0 hours total
- Fire on the ground
The flight
- Departed from: P49 Somerton AZ
- Flight plan: none
- Runway 14, 2,000 ft by 200 ft
Weather at the time
- Light: daylight
- Wind: from 230° at 5 knots
- Visibility: 15 statute miles
- Sky: broken clouds at 2,500 ft; clear
- Temperature: 90°F (32°C), dew point 72°F (22°C)
- Altimeter: 29.00 inHg
- Observation at 5:55 pm from YUM, 8 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.