Incident Overview
On 8 June 2016, a Bombardier DHC-8-400 aircraft operated by PLL LOT S.A. was preparing for departure from Warsaw Chopin Airport (EPWA). During the boarding process, ground handling staff and a mechanic observed indications of low pressure in the tire of the right nose landing gear wheel. The aircraft had undergone a pre-flight inspection by the first officer half an hour earlier, and a handling agent had also performed a check, both of which did not reveal any anomalies.
Sequence of Events
Upon noticing the low tire pressure, the mechanic assessed the situation and determined that both nose wheels required replacement. Passengers were transported back to the terminal building while the wheel change was carried out. After the wheels were replaced, the flight departed with a delay. Following the flight, an Air Safety Report (ASR) was filed.
Cause
The investigation determined that the incident resulted from a loss of seal in the right nose landing gear tire.
Aftermath
The operator recorded the event in its safety management system (SMS) database and classified it according to internal criteria. The incident was included in the safety performance indicators (SPI) monitored under the company's Safety Management Manual. No safety recommendations were issued by the investigating body.