# NTSB Incident ENG12IA004
> **BOMBARDIER CL600 2C10** · 2011-10-23 · Atlanta, GA, USA · NONE
## Event
- **NTSB number:** ENG12IA004
- **Event ID:** 20111027X01810
- **Type:** Incident
- **Date:** 2011-10-23
- **Location:** Atlanta, GA, USA
- **Coordinates:** 33.750709, -84.389755
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 0
## Aircraft
- **Make:** BOMBARDIER
- **Model:** CL600 2C10
- **Registration:** N751EV
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** —
- **Weather:** —
## Probable cause

The Start Operability Bleed Valve (OBV) fuel return adapter-fitting fractured and separated in cyclic fatigue, which allowed fuel to spill onto a hot engine case that ignited the undercowl fire.  The OBV fuel adapter-fitting was dropped and the damage reduced its load carrying and fatigue capability, eventually leading to its failure.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG12IA004) · AI Analytics · CC0 1.0*