Incident Overview
On 29 February 2016, an incident occurred at EPLB airport involving an Airbus A320. According to the report, the measurement of runway visual range (RVR) via dedicated equipment showed considerable differences within the same system.
Sequence of Events
The weather observer informed the TWR operations position that the RVR indications lacked authorization regarding their values. For the departure of the Airbus A320, the current RVR value was assessed by the weather observer and subsequently passed to the flight crew by the air traffic controller.
Cause of the Incident
The cause of the differing RVR output data was determined to be the use of two different server addresses, which transmitted current RVR information to operational positions without synchronization, resulting in discrepancies in the displayed RVR data.
Preventive Actions
A change was implemented in the configuration of the RVR data transfer system, which now presents information from a single server.
Safety Recommendations
Following the investigation, the State Commission on Aircraft Accident Investigation (PKBWL) did not issue any safety recommendations.