# NTSB Incident CEN11IA156
> **SIKORSKY 92** · 2011-01-19 · Galliano, LA, USA · NONE
## Event
- **NTSB number:** CEN11IA156
- **Event ID:** 20110120X65144
- **Type:** Incident
- **Date:** 2011-01-19
- **Location:** Galliano, LA, USA
- **Coordinates:** 29.437778, -90.256668
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 18
- **Total aboard:** 18
## Aircraft
- **Make:** SIKORSKY
- **Model:** 92
- **Registration:** N920AL
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The misalignment of the retaining washer during routine maintenance, resulting in the subsequent separation of the washer and nut.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN11IA156) · AI Analytics · CC0 1.0*