# NTSB Incident DCA12IA096
> **AIRBUS A320** · 2012-06-17 · Las Vegas, NV, USA · NONE
## Event
- **NTSB number:** DCA12IA096
- **Event ID:** 20120621X34639
- **Type:** Incident
- **Date:** 2012-06-17
- **Location:** Las Vegas, NV, USA
- **Coordinates:** 40.759628, -73.710739
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 154
- **Total aboard:** 154
## Aircraft
- **Make:** AIRBUS
- **Model:** A320
- **Registration:** N552JB
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the failure of the right main landing gear door retraction flexible hydraulic line in the Green hydraulic system, which led to prolonged operation of the power transfer unit and subsequent overheating and loss of pressure in the Yellow hydraulic system, resulting in the airplane's operation with only one hydraulic system. Contributing to the incident was the lack of incorporation of aircraft manufacturer service bulletins that describe procedures for aircraft modifications intended to prevent this occurrence.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DCA12IA096) · AI Analytics · CC0 1.0*