sentences:  The company owns a number of restored diesel locomotives, including a pair of former Conrail EMD E8s which have been meticulously overhauled and painted in the Pennsylvania Railroad wide-stripe paint scheme.These two units often pull the company's private passenger cars, and can be seen on special excursions with Amtrak equipment.As of 2019, these units are not in operation due to a decision by the owner not to retrofit them with positive train control (PTC).