Procedures in the event of malfunctioning equipment
Article 37
1. In the event of the breakdown or faulty operation of a tachograph, the transport undertaking shall have it repaired by an approved fitter or workshop, as soon as circumstances permit. If the vehicle is unable to return to the transport undertaking’s premises within a period of one week calculated from the day of the breakdown or of the discovery of defective operation, the repair shall be carried out en route. Measures taken by Member States pursuant to Article 41 shall give the competent authorities power to prohibit the use of the vehicle in cases where the breakdown or faulty operation has not been remedied as provided in the first and the second subparagraphs of this paragraph in so far as this is in accordance with the national legislation in the Member State concerned. 2. While the tachograph is unserviceable or malfunctioning, the driver shall mark data enabling him to be identified (name, driver card or driving licence number), including a signature, as well as the information for the various periods of time which are no longer recorded or printed out correctly by the tachograph: (a) on the record sheet or sheets, or (b) on a temporary sheet to be attached to the record sheet or to be kept together with the driver card.