Incident Overview
On 3 May 2014, a Boeing 737-800 was performing an approach to runway 09 at EPRZ airport. At the intersection of runway 09 and taxiway A, personnel from a contractor were installing navigation lighting systems. The air traffic controller (TWR EPRZ) instructed the workers to promptly clear the runway area due to the approaching aircraft. However, because the workers did not confirm they were at a safe distance, the controller ordered the flight crew to abort the approach and execute a go-around. The aircraft subsequently performed a second approach and landed without further incident.
Cause
The Polish State Commission on Aircraft Accident Investigation determined that the cause of the event was the air traffic controller's late instruction for the workers to leave the runway. According to established procedures, workers are required to collect their tools and move to a safe distance from the runway, which necessitates timely notification of planned flight operations.
Preventive Actions
Following the incident, an electronic reminder regarding runway occupancy was installed on the airport lighting control panel. Additionally, the communication system at the operational station was equipped with a "Runway Incursion" function that alerts the controller to runway occupancy.
Safety Recommendations
The investigation concluded without issuing any safety recommendations.