# NTSB Accident LAX00LA250
> **Thorp T211** · 2000-07-04 · GRASS VALLEY, CA, USA · SERS
## Event
- **NTSB number:** LAX00LA250
- **Event ID:** 20001212X21497
- **Type:** Accident
- **Date:** 2000-07-04
- **Location:** GRASS VALLEY, CA, USA
- **Coordinates:** 39.179141, -120.979347
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Thorp
- **Model:** T211
- **Registration:** N91313
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the pilot encountered a mountain wave at an altitude too low to maintain clearance from trees.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX00LA250) · AI Analytics · CC0 1.0*