# NTSB Accident LAX91LA090
> **RIDDELL LANCAIR 235** · 1991-02-01 · AGUA CALIENTE, CA, USA · SERS
## Event
- **NTSB number:** LAX91LA090
- **Event ID:** 20001212X16466
- **Type:** Accident
- **Date:** 1991-02-01
- **Location:** AGUA CALIENTE, CA, USA
- **Coordinates:** 32.789661, -116.959495
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** RIDDELL
- **Model:** LANCAIR 235
- **Registration:** N17S
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE FAILURE OF THE PROPELLER BLADES DUE TO A WEAKENING OF THE WOOD STRUCTURE DUE TO ACID HYDROLYSIS.  A FACTOR IN THE ACCIDENT WAS THE INADEQUATE MAINTENANCE OF THE PROPELLER ASSEMBLY BY ALLOWING EXPOSURE TO EXCESSIVE MOISTURE AND HEAT.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX91LA090) · AI Analytics · CC0 1.0*