# NTSB Accident LAX91LA347
> **EXPERIMENTAL RV4** · 1991-08-05 · NAPA, CA, USA · NONE
## Event
- **NTSB number:** LAX91LA347
- **Event ID:** 20001212X17891
- **Type:** Accident
- **Date:** 1991-08-05
- **Location:** NAPA, CA, USA
- **Coordinates:** 38.549114, -122.149208
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** EXPERIMENTAL
- **Model:** RV4
- **Registration:** N835B
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

THE INSTALLATION OF A NON COMPATIABLE OIL FILTER AND SYSTEM PLUMBING CHANGES WHICH INDUCED THE OIL EXHAUSTION EVENT RESULTING IN A FORCED LANDING AND IN FLIGHT COLLISION WITH TERRAIN.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX91LA347) · AI Analytics · CC0 1.0*