# NTSB Incident ENG23LA031
> **BOEING 737-9** · 2023-06-28 · Newark, NJ, USA · NONE
## Event
- **NTSB number:** ENG23LA031
- **Event ID:** 20230630192493
- **Type:** Incident
- **Date:** 2023-06-28
- **Location:** Newark, NJ, USA
- **Coordinates:** 40.688689, -74.173724
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 184
- **Total aboard:** 184
## Aircraft
- **Make:** BOEING
- **Model:** 737-9
- **Registration:** N37516
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** Unk
## Probable cause

A No. 1 (left) engine fire due a fuel leak that originated from the fuel nozzle 17 b-nut connection that was not properly torqued in accordance with the aircraft maintenance manual procedure.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG23LA031) · AI Analytics · CC0 1.0*