# NTSB Incident DCA12IA114
> **BOEING 787** · 2012-07-28 · Charleston, SC, USA · NONE
## Event
- **NTSB number:** DCA12IA114
- **Event ID:** 20120728X22222
- **Type:** Incident
- **Date:** 2012-07-28
- **Location:** Charleston, SC, USA
- **Coordinates:** 32.898612, -80.040557
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 5
- **Total aboard:** 5
## Aircraft
- **Make:** BOEING
- **Model:** 787
- **Registration:** VT-ANJ
- **FAR Part:** 091
- **Engines:** —
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The separation of the fan mid shaft resulted from environmentally assisted cracking under static load.  Contributing to the incident was the combination of dry film lubricant applied to the fan mid-shaft and graphite grease used during assembly which made the fan mid-shaft susceptible to corrosion from trapped moisture, and the failure of the engine manufacturer to identify this vulnerability during design/development.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DCA12IA114) · AI Analytics · CC0 1.0*