# NTSB Accident LAX02LA294
> **Robinson R22B** · 2002-09-23 · Silverado, CA, USA · NONE
## Event
- **NTSB number:** LAX02LA294
- **Event ID:** 20020927X05235
- **Type:** Accident
- **Date:** 2002-09-23
- **Location:** Silverado, CA, USA
- **Coordinates:** 33.75, -117.566665
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Robinson
- **Model:** R22B
- **Registration:** N2331
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The student's failure to maintain adequate main rotor rpm, and the flight instructor's inadequate supervision of the flight.  Contributing factors were the hilly terrain and the relative high density altitude conditions.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX02LA294) · AI Analytics · CC0 1.0*