# Accident 20040507009249A: Amtr SIDEWINDER, Natrona, WY, May 7, 2004

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 7, 2004, 12:30 local time
- Place: Natrona, WY
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 43.0500° N, 106.7833° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=43.0500&lon=-106.7833&mi=10
- Aircraft: N92AC, a cancelled registration (https://openairdocs.org/deregistered/N92AC-2013-07-30) (OpenAirDocs)
- Registry model: Crimmins SMYTH SIDEWINDER (registry code 0564923, https://openairdocs.org/model/crimmins-smyth-sidewinder) (OpenAirDocs)
- Registry engine: Lycoming 0-290 series (registry code 41506, https://openairdocs.org/engine/lycoming-0-290-series) (OpenAirDocs)
- Reported make and model: AMTR SIDEWINDER
- Reported engine: LYC O290
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 722 total, 6 in this make and model, 18 in the last 90 days
- NTSB investigation: [NTSB DEN04LA070](https://openairdocs.org/ntsb/DEN04LA070) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20040507009249A

## Narrative

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

(-23) ON A FLIGHT FROM THERMOPOLIS, WYOMING TO CASPER, WYOMING AT A CRUISE ALTITUDE OF 9,500 FEET MSL THE ENGINE, WHICH HAD BEEN PRODUCING 2500 RPM, BEGAN "SURGING" AND STARTED TO LOSE POWER. CARBURETOR HEAT AND MIXTURE ADJUSTMENT DID NOT RESTORE POWER AND THE PILOT MADE AN EMERGENCY LANDING ON RANCH LAND. DURING LANDING ROLL THE NOSE GEAR COLLAPSED ALONG WITH BOTH MAIN GEARS. DURING THE WEEK OF MAY 24, 2004 THE CARBURETOR WILL BE INSPECTED, FURTHER INVESTIGATION IS REQUIRED. (-23 AMENDMENT) THE FUEL SYSTEM WAS INSPECTED BY THE NTSB ON JUNE 23, 2004, THE EXAMINATION OF THE SELECTOR REVEALED A CONSIDERABLE AMOUNT OF FINE GRIT INSIDE THE FUEL SCREEN. SIMILAR GRIT WAS SEEN INSIDE THE FUEL TANK. THIS GRIT CAUSED FUEL STARVATION TO THE ENGINE.

## 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 DEN04LA070](https://openairdocs.org/ntsb/DEN04LA070), May 7, 2004: Crimmins Smyth Sidewinder (N92AC), Natrona, WY, substantial damage. Probable cause: fuel starvation due to contamination, resulting in the fuel selector valve becoming totally blocked. Contributing factors were the inadequate conditional inspection, and the lack of nsuitable terrain…

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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