# Accident 20251002014589A: Siai-Marchetti SM 1019, Richland, WA, October 2, 2025

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 2, 2025, 10:50 local time
- Place: Richland, WA
- Airport: Richland
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 46.3056° N, 119.3042° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=46.3056&lon=-119.3042&mi=10
- Aircraft: N3172U, registered now (https://openairdocs.org/aircraft/N3172U) (OpenAirDocs)
- Registry model: Siai-Marchetti SM 1019 (registry code 8121215, https://openairdocs.org/model/siai-marchetti-sm-1019) (OpenAirDocs)
- Registry engine: Allison 250-B15G (registry code 03064, https://openairdocs.org/engine/allison-250-b15g) (OpenAirDocs)
- Reported make and model: SIAI-MARCHETTI SM 1019
- Reported engine: ALLISON 250-B15G
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 10,000 total, 550 in this make and model, 16 in the last 90 days
- NTSB investigation: [NTSB WPR26LA006](https://openairdocs.org/ntsb/WPR26LA006) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20251002014589A

## Narrative

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

PILOT NOTICED RPM FLUXUATIONS IN CRUISE FLIGHT AND WAS GETTING WORSE. DECIDED TO LAND THE AIRCRAFT.  PILOT MOVED CONDITION LEVER FORWARD FOR LANDING IT FELT LIKE AIRPLANE WAS GOING FROM BETA TO FLIGHT IDLE WITHOUT MOVING CONTROLS.  DURING LANDING, FELT LIKE WENT INTO BETA AND AIRSPEED DROPPED BELOW STALL SPEED (30 KNOTS). ADDED POWER CAUSED POWER INCREASE SURGE.  PROP WENT INTO BETA AND AIRCRAT HIT GROUND HARD TAKING OFF RIGHT LANDING GEAR. POWER SURGED AGAIN AFTER SLOWING DOWN CAUSED AIRCRAFT TO GO 90 DEGREES TO LEFT AND INTO GRAVEL FOR A GROUND LOOP. ROOT CAUSE IS TO SPECULATE PROP GOVERNOR ACTED ERRATICALLY. POSSIBLE MALFUNCTION INTERNALLY OR LINKAGE ISSUE. COWLING WAS REMOVED AND FOUND NOTHING DISCONNECTED IN LINKAGE. SUSPECT COULD HAVE BEEN SLACK OR LOW TENSION CAUSING A BOW IN LINKAGE NOT GIVING PROPER RESPONSE BETWEEN CONTROL LEVER AND PROP GOVERNOR. SDR IS INTENDED WHEN FIRM MECHANICAL CAUSE IS DISCOVERED.

## 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 WPR26LA006](https://openairdocs.org/ntsb/WPR26LA006), Oct 2, 2025: Siai-Marchetti SM 1019 (N3172U), Richland, WA, substantial damage, investigation ongoing

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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