 nir 3432 cl170 bearing failure leading to fire cl170 turbostar bearing failure risk controls are being actively managed a bearing modification programme is progressing at c4 overhaul and turbostar operators are monitoring bearing condition via sensors and riding inspectors porterbrook is continuing to liaise with tocs on monitoring arrangementselectros	tar bearing monitoring arrangements are under review with gtr porterbrook is supporting gtr with the trial of new monitoring sensors nir 3526 cl156 modified elite kl heat and vent unit intake filter fire a new filter with improved fire performance has been identified porterbrook will make new filters available to tocs from june nir 3528 cl170 turbostar gangway bridge plate failure cl170 gangways remain under regular inspection and a modification to reduce failures is being implemented by the tocs hubner uk has confirmed that all new gangway material is being manufactured and supplied to an improved design as of the start of 2019 a gangway bridge plate strategy for electrostar fleets is being developed with gtr with a target of early q3 for agreement nir 3535 cl455 ac traction pinion gear detached in service a second fleet check is ongoing and pinion gear fixings are being adjusted as part of the work a programme is being developed to refit the pinion gears and will be issued in q3 after scope and unit availability have been confirmed 