# Accident 20000825006779A: Airtrc AT401, Superior, NE, August 25, 2000

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 25, 2000, 19:30 local time
- Place: Superior, NE
- Damage: No damage
- Operating rules: Agricultural (Part 137)
- Location: 40.0208° N, 98.0592° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=40.0208&lon=-98.0592&mi=10
- Aircraft: N91842 (not matched to a registry record)
- Reported make and model: AIRTRC AT401
- NTSB investigation: [NTSB CHI00LA271](https://openairdocs.org/ntsb/CHI00LA271) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20000825006779A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) ON FRIDAY, AUGUST 28, 2000, N91842, AN AIR TRACTOR 401, WAS INVOLVED IN AERIAL APPLICATION THREE MILES ESE OF SUPERIOR, NEBRASKA. AFTER A SPRAY RUN, WHILE IN A LEFT TURN, THE ENGINE STARTED TO MISS AND SMOKE EXCESSIVELEY. THE PILOT ATTEMPTED TO SET THE A/C DOWN IN A PASTURE NEXT TO THE HORSESHOE BEND AREA OF THE REPUBLICAN RIVER AND STRUCK AN ELM TREE. INVESTIGATION REVEALED A CRACK OF THE NUMBER 7 CYLINDER ON THE EXHAUST VALVE TOWER ABOVE THE COOLING FINS APPROXIMATELY 1/2 INCH BELOW THE ROCKERBOX. THE CRACK EXTENDED COMPLETELY THROUGH THE EXHAUST VALVE CYLINDER TOWER.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI00LA271](https://openairdocs.org/ntsb/CHI00LA271), Aug 26, 2000: Air Tractor AT-401 (N91842), Superior, NE, destroyed. Probable cause: the cracked number 7 cylinder exhaust valve. A factor relating to this accident was the tree.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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