The involved Railway Undertaking, in cooperation with the authorized Entity in Charge of Maintenance, should inspect all vehicles series 7121 and 7122 within 3 months to determine if they are equipped with an automatic tube-type fire suppression system in the engine compartment, if not these must be installed within 12 months. On series 7122, the same device must be installed within 12 months in the cabinet through which the engine exhaust system passes.