Recommendation: 202106-01

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Ref # 202106-01
Status Open / In progress
Occurrence Luas Overhead Line Failure, Stillorgan, 2nd November 2020
Occurrence Date 02 November 2020

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.