# NTSB Accident LAX90LA168
> **ROBINSON R22** · 1990-05-09 · IRVINE, CA, USA · NONE
## Event
- **NTSB number:** LAX90LA168
- **Event ID:** 20001212X23171
- **Type:** Accident
- **Date:** 1990-05-09
- **Location:** IRVINE, CA, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON
- **Model:** R22
- **Registration:** N9070N
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE CFI'S FAILURE TO MAINTAIN ROTOR RPM DURING THE PRACTICE AUTOROTATION.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX90LA168) · AI Analytics · CC0 1.0*