# NTSB Accident LAX99LA181
> **Piper PA-31-310** · 1999-04-15 · LA VERNE, CA, USA · NONE
## Event
- **NTSB number:** LAX99LA181
- **Event ID:** 20001205X00512
- **Type:** Accident
- **Date:** 1999-04-15
- **Location:** LA VERNE, CA, USA
- **Coordinates:** 34.149276, -117.760986
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Piper
- **Model:** PA-31-310
- **Registration:** N57AS
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The in-flight separation of the right engine cowling  due to the operator's inadequate maintenance quality control procedures and the pilot's inadequate preflight inspection.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX99LA181) · AI Analytics · CC0 1.0*