# NTSB Incident OPS10IA538
> **BOEING 737-7H4** · 2010-09-04 · Los Angeles, CA, USA · NONE
## Event
- **NTSB number:** OPS10IA538
- **Event ID:** 20100908X20427
- **Type:** Incident
- **Date:** 2010-09-04
- **Location:** Los Angeles, CA, USA
- **Coordinates:** 33.969326, -118.239624
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 133
- **Total aboard:** 133
## Aircraft
- **Make:** BOEING
- **Model:** 737-7H4
- **Registration:** N907WN
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Failure of the air traffic controller to exercise positive control of the situation by issuing clear and timely control instructions to the helicopter pilot.  Contributing to the incident was delay by the helicopter pilot in responding to instructions issued by the controller.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=OPS10IA538) · AI Analytics · CC0 1.0*