FTW98FA272 · Ayres S2R-R1340
Ayres S2R-R1340 · Accident: loss of control in flight while maneuvering
From No airport to an unrecorded destination
Event
- NTSB case
- FTW98FA272
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 1 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Ayres S2R-R1340
- Aircraft type
- Ayres S2
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N4020G
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From No airportTo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 137: Agricultural
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Maneuvering · aerial application
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Loss of control in flight
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Tree(s)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Pilot in command › Visual lookout, inadequate
- Reason for occurrence undetermined
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The agricultural aircraft impacted trees while applying fertilizer to a rice field. A person about a mile from the field where the pilot was working, heard the airplane as it worked the field. About 3 or 4 minutes after he heard the airplane's engine 'quit,' and he saw smoke. Continuity was established to all flight control surfaces, and both propeller blades exhibited signatures of engine power. The pilot had reported not feeling good and planned to go home after the next flight. Although the autopsy of the pilot noted severe coronary disease, there were no areas of complete blockage of the coronary arteries, and there was no evidence of an old or recent myocardial infarction (heart attack) identified. The pilot was being treated for high blood pressure with two medicines: Sural (nisoldipine) and Levatol (penbutolol). Nisoldipine and Penbutolol are prescription medications prescribed for patients with high blood pressure. Possible side effects include low blood pressure and slowed heart rate. Also, it was possible that the pilot's medications in combination with his existing cardiac disease could have significantly reduced his tolerance to repeated G-exposure.
Probable cause
The pilot's visual lookout was inadequate for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW98FA272
- Event ID
- 20001211X10291
- Case number
- FTW98FA272
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: b9b6ae38c20e18350c3a7792dd7f28c87c287cd7f4a3eb0ad5ff6b3cb9d5e7ff; retrieved 2026-09-20T22:32:28.416Z.