# NTSB Accident LAX92FA374
> **PIPER PA-23-160** · 1992-09-02 · CONCORD, CA, USA · FATL
## Event
- **NTSB number:** LAX92FA374
- **Event ID:** 20001211X15705
- **Type:** Accident
- **Date:** 1992-09-02
- **Location:** CONCORD, CA, USA
- **Coordinates:** 38.000041, -122.030906
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** PIPER
- **Model:** PA-23-160
- **Registration:** N4305Y
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The following Probable Cause was modified on April18, 2007, as a result of new information provided to the NTSB.  THE IMPROPER INSTALLATION OF THE 1.75 INCH OD PLUG IN THE CRANKSHAFT BY UNKNOWN MAINTENANCE PERSONNEL WHICH RESULTED IN AN INADVERTENT FEATHERING OF THE LEFT ENGINE PROPELLER.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX92FA374) · AI Analytics · CC0 1.0*