# NTSB Incident ENG17IA005
> **EMBRAER ERJ170 200LR** · 2016-12-04 · San Antonio, TX, USA · MINR
## Event
- **NTSB number:** ENG17IA005
- **Event ID:** 20161205X55455
- **Type:** Incident
- **Date:** 2016-12-04
- **Location:** San Antonio, TX, USA
- **Coordinates:** 29.531389, -98.46833
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 58
- **Total aboard:** 59
## Aircraft
- **Make:** EMBRAER
- **Model:** ERJ170 200LR
- **Registration:** N161SY
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A failure of the nose landing gear down lock spring which precluded normal downlock operation of the nose landing gear.  The spring failure was due to the presence of too much retained austenite which led to the formation of progressive cracking and subsequent failure of the spring.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG17IA005) · AI Analytics · CC0 1.0*