Article 39 3.

Where an approval authority finds that engines accompanied by a statement of conformity, if applicable, or bearing a type-approval mark issued in another Member State are not in conformity with the approved engine type or engine family, it may request that the approval authority which granted the EU type-approval verify that the engines in production continue to conform to the approved engine type or engine family. On receipt of such a request, the approval authority which granted the EU type-approval shall take the action referred to in paragraph 1 as soon as possible, and at the latest within three months of the date of the request.