Incident Overview
On 22 August 2014, an air traffic controller at Warsaw Chopin Airport (EPPW) observed four unknown ultralight aircraft within the airport's Military Air Traffic Zone (MATZ). The aircraft were traveling from the northeast to the southwest, crossing the approach axis of runway 28L approximately 1 nautical mile from the threshold. At the same time, a PZL M-28 aircraft was conducting a traffic pattern flight within the MATZ.
Air Traffic Control Response
The controller informed the pilot of the PZL M-28 about the observed traffic. The pilot, while maintaining visual separation from other airspace users, safely completed the planned flight task.
Investigation and Cause
The Polish State Commission for Aircraft Accident Investigation (PKBWL) investigated the incident. Despite efforts, the commission could not identify the pilots of the ultralight aircraft. The probable cause was determined to be a navigation error by the ultralight pilots, leading to the violation of the EPPW MATZ. No safety recommendations were issued.