# NTSB Accident DCA11MA039
> **BOEING 737** · 2011-04-01 · Yuma, AZ, USA · MINR
## Event
- **NTSB number:** DCA11MA039
- **Event ID:** 20110401X24330
- **Type:** Accident
- **Date:** 2011-04-01
- **Location:** Yuma, AZ, USA
- **Coordinates:** 32.656665, -114.605834
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 120
- **Total aboard:** 122
## Aircraft
- **Make:** BOEING
- **Model:** 737
- **Registration:** N632SW
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the improper installation of the fuselage crown skin panel at the S-4L lap joint during the manufacturing process, which resulted in multiple site damage fatigue cracking and eventual failure of the lower skin panel. Contributing to the injuries was flight attendant A's incorrect assessment of his time of useful consciousness, which led to his failure to follow procedures requiring immediate donning of an oxygen mask when cabin pressure is lost.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DCA11MA039) · AI Analytics · CC0 1.0*