# NTSB Incident OPS07IA010
> **Learjet 35** · 2007-09-13 · Washington, DC, USA · NONE
## Event
- **NTSB number:** OPS07IA010
- **Event ID:** 20070927X01453
- **Type:** Incident
- **Date:** 2007-09-13
- **Location:** Washington, DC, USA
- **Coordinates:** 38.90953, -77.020584
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 4
- **Total aboard:** 4
## Aircraft
- **Make:** Learjet
- **Model:** 35
- **Registration:** N66NJ
- **FAR Part:** 135
- **Engines:** —
- **Damage:** —
## Conditions
- **Light:** —
- **Weather:** VMC
## Probable cause

The probable cause of this incident was the IAD tower local controller's failure to ensure that the runway was free of all known ground vehicles, equipment, and personnel before permitting a departing aircraft to start takeoff roll.  Additionally, the controller did not comply with local directives prohibiting taxi into position and hold operations while tower positions were combined.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=OPS07IA010) · AI Analytics · CC0 1.0*