# NTSB Accident DCA13MA120
> **BOEING 777-200ER** · 2013-07-06 · San Francisco, CA, USA · FATL
## Event
- **NTSB number:** DCA13MA120
- **Event ID:** 20130707X83745
- **Type:** Accident
- **Date:** 2013-07-06
- **Location:** San Francisco, CA, USA
- **Coordinates:** 37.613334, -122.363891
## Injuries
- **Highest injury:** FATL
- **Fatal:** 3
- **Serious:** 50
- **Minor:** 137
- **Uninjured:** 117
- **Total aboard:** 307
## Aircraft
- **Make:** BOEING
- **Model:** 777-200ER
- **Registration:** HL7742
- **FAR Part:** 129
- **Engines:** 2
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The  flight  crew's  mismanagement  of  the  airplane's  descent  during  the  visual approach, the pilot flying's unintended deactivation of automatic airspeed control, the flight crew's inadequate monitoring of airspeed, and the flight crew's delayed execution of a go-around after  they  became  aware  that  the  airplane  was  below  acceptable  glidepath  and  airspeed tolerances.    Contributing  to  the  accident  were  (1)  the  complexities  of  the  autothrottle  and autopilot flight director systems that were inadequately described in Boeing's documentation and Asiana's pilot training, which increased the likelihood of mode error; (2) the flight crew's nonstandard communication and coordination regarding the use of the autothrottle and autopilot flight director systems; (3) the pilot flying's inadequate training on the planning and executing of visual approaches; (4) the pilot monitoring/instructor pilot's inadequate supervision of the pilot flying; and (5) flight crew fatigue, which likely degraded their performance.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DCA13MA120) · AI Analytics · CC0 1.0*