# NTSB Accident LAX07LA274
> **Robinson R22 Beta** · 2007-09-14 · El Monte, CA, USA · NONE
## Event
- **NTSB number:** LAX07LA274
- **Event ID:** 20070927X01461
- **Type:** Accident
- **Date:** 2007-09-14
- **Location:** El Monte, CA, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Robinson
- **Model:** R22 Beta
- **Registration:** N877HF
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

a failure of the main rotor drive system V-belts due to damage sustained when the alternator drive belt failed and pieces of that belt got between the main drive belts and their associated pulleys.  A contributing factor was the uneven terrain encountered in the forced landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX07LA274) · AI Analytics · CC0 1.0*