Recommendation: 202106-01

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Ref # 202106-01
Status Closed
Occurrence Luas Overhead Line Failure, Stillorgan, 2nd November 2020
Occurrence Date 02 November 2020
Date Closed 09/10/2024

Basis for Recommendation

In terms of the Overhead Contact System (OCS) mechanism of failure, the OCS wire failed as a result of necking, which was not detected in scheduled OCS inspections. In addition, post-incident inspections of the Green Line indicate necking at eight other locations of the Green Line. Also, the current inspection regime does not identify Cupric Oxide as a precursor to necking. As a result, the RAIU make the following safety recommendation:

Recommendation

Transdev, along with S2M, should conduct a full review of their inspection processes for Overhead Contact System (OCS) wires to ensure pre-cursors, likely location and faults with the OCS are referenced.