Incident Overview
On 4 July 2017 at 15:10 UTC, a ground airstarter hose ruptured at the coupling ring while supplying compressed air to engines 1 and 2 of an Embraer ERJ-195 (registration SP-LNF) operated by PLL LOT S.A. The aircraft was preparing for flight LO677 from Warsaw Chopin Airport (EPWA) to Moscow Sheremetyevo (UUEE). The rupture occurred after engine 2 had been started.
Injuries and Damage
The two ground personnel involved in the operation sustained no injuries. The aircraft was not damaged.
Probable Cause
The investigation determined that the most probable cause of the hose failure was natural technical wear of the hose. No contributing factors were identified.
Investigation Details
The incident was investigated by the Polish State Commission on Aircraft Accident Investigation (PKBWL). The investigation was conducted solely for prevention purposes, in accordance with applicable international, EU, and national regulations. No safety recommendations were issued, and no systemic changes were proposed. The user/operator did not report any preventive actions taken.