CEN10LA437 · Air Tractor AT-602
Har-Mor Ag Air Air Tractor AT-602 · Accident: loss of engine power (total) while maneuvering
From Monmouth Municipal Airport (C66) to Monmouth Municipal Airport (C66)
Event
- NTSB case
- CEN10LA437
- 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
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- 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
Air Tractor AT-602
- Aircraft type
- Air Tractor AT-602
- 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
- N8521L
- Operator
- Har-Mor Ag Air
- Onboard fatalities
- Unknown
- Route
- From Monmouth Municipal Airport (C66), Monmouth, ILTo Monmouth Municipal Airport (C66), Monmouth, IL
- 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 · low-altitude flying
- Defining eventThe 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 engine power (total)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Aircraft › Aircraft power plant
- Not determined › Not determined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot reported that after he completed the aerial application, he climbed to 500 to 600 feet above ground level. After he leveled the airplane, he heard a loud sound and the engine lost power. He executed a forced landing to a cornfield, during which the wings and fuselage sustained substantial damage. The pilot reported that he had about 50 to 75 gallons of fuel remaining in the wing tanks, when the accident occurred. The postaccident inspection of the airplane revealed that no fuel was visible in the left and right wing tanks, but fuel was observed coming out of the right wing root. The engine was removed from the airframe and fuel was found in the fuel lines and fuel filter. The postaccident inspection of the airframe, engine, and engine components revealed no preimpact anomalies that would preclude normal engine operation. According to the lineman who fueled the airplane prior to departure, the right tank was full, and the left tank was nearly full. The endurance for the airplane was 3.2 hours; it had been flying for about 1 1/2 hours when the loss of power occurred.
Probable cause
The loss of engine power for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN10LA437
- Event ID
- 20100726X53555
- Case number
- CEN10LA437
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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, coordinates. 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: 824b66b9d4408284ea2e04474aeb056d20029701db83a858dc8961c3b923fc71; retrieved 2026-09-15T14:45:28.297Z.