# Accident 19910609020489A: Waco ASO, Montague, CA, June 9, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 9, 1991, 15:00 local time
- Place: Montague, CA
- Airport: Montague Municipal Airport
- Damage: Substantial damage
- Phase of flight: Takeoff Ground Roll
- Operating rules: General operating rules (Part 91)
- Location: 41.7601° N, 122.3903° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=41.7601&lon=-122.3903&mi=10
- Aircraft: N4W, registered now (https://openairdocs.org/aircraft/N4W) (OpenAirDocs)
- Registry model: Waco ASO (registry code 9601202, https://openairdocs.org/model/waco-aso) (OpenAirDocs)
- Registry engine: Continental R670-SERIES series (registry code 17016, https://openairdocs.org/engine/continental-r670-series-series) (OpenAirDocs)
- Reported make and model: WACO ASO
- Reported engine: CONT W6706A
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 2,819 total, 1,198 in this make and model, 21 in the last 90 days
- NTSB investigation: [NTSB LAX91LA256](https://openairdocs.org/ntsb/LAX91LA256) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910609020489A

## Narrative

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

TAIL WHEEL VIBRATED. LOST DIRECTIONAL CONTROL. RIGHT MAIN CLOGGED WITH GRASS LEAVING RUNWAY. NOSED OVER.

## 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 LAX91LA256](https://openairdocs.org/ntsb/LAX91LA256), Jun 9, 1991: Weaver WACO-ASO (N4W), Montague, CA, substantial damage. Probable cause: FAILURE OF THE PILOT TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE AND IMPROPER USE OF THE BRAKES.

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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