# NTSB Accident LAX89LA217
> **CESSNA 421** · 1989-06-17 · PICACHO, AZ, USA · MINR
## Event
- **NTSB number:** LAX89LA217
- **Event ID:** 20001213X28599
- **Type:** Accident
- **Date:** 1989-06-17
- **Location:** PICACHO, AZ, USA
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 4
- **Uninjured:** 0
- **Total aboard:** 4
## Aircraft
- **Make:** CESSNA
- **Model:** 421
- **Registration:** N421S
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

FAILURE OF THE NUMBER THREE EXHAUST VALVE ON THE LEFT ENGINE. A MAJOR FACTOR WAS THE HIGH DENSITY ALTITUDE WHERE THE AIRPLANE WOULD NOT OPERATE ON SINGLE ENGINE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX89LA217) · AI Analytics · CC0 1.0*