# NTSB Accident LAX90LA066
> **MOONEY M20B** · 1990-01-07 · SANTA ANA, CA, USA · MINR
## Event
- **NTSB number:** LAX90LA066
- **Event ID:** 20001212X22434
- **Type:** Accident
- **Date:** 1990-01-07
- **Location:** SANTA ANA, CA, USA
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** MOONEY
- **Model:** M20B
- **Registration:** N74520
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE FAILURE OF BOLTS RETAINING THE IDLER SHAFT ALLOWING THE CAM SHIFT TIMING TO CHANGE AND BY ITS FAILURE TO DRIVE THE LEFT MAGNETO.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX90LA066) · AI Analytics · CC0 1.0*