# NTSB Accident LAX91LA182
> **ROBINSON R22-BETA** · 1991-04-20 · PHOENIX, AZ, USA · SERS
## Event
- **NTSB number:** LAX91LA182
- **Event ID:** 20001212X16821
- **Type:** Accident
- **Date:** 1991-04-20
- **Location:** PHOENIX, AZ, USA
- **Coordinates:** 33.679492, -112.089164
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** ROBINSON
- **Model:** R22-BETA
- **Registration:** N4066J
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE PILOT'S FAILURE TO MAINTAIN MAIN ROTOR RPM.  FACTOR CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S INADEQUATE IN-FLIGHT PLANNING.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX91LA182) · AI Analytics · CC0 1.0*