What happened
On August 20, 2011, the operator PLL LOT SA was notified that aircraft components had been found at Helsinki-Vantaa Airport (EFHK). These components were identified as damaged parts from the number 3 brake assembly of an EMBRAER ERJ-170-200, registration SP-LID. The aircraft had performed flight LO471-472 from Warsaw to Helsinki the previous day. The brake assembly had been replaced in accordance with the Aircraft Maintenance Manual (AMM).
The investigation
The investigation examined the maintenance history and operational procedures of the fleet. It was noted that the brake assemblies, manufactured by MEGGITT, had been subject to various service bulletins and inspection recommendations. The investigation also reviewed the impact of the Improved Go/Around Procedure (IGAP), which was in effect from April 2011 to March 2012. This procedure resulted in higher approach and landing speeds.
Due to the expiration of the retention period for investigation records by the operator, the PKBWL was unable to access further specific data regarding the exact circumstances of this specific occurrence and concluded the investigation without determining a specific cause.