The AAR Standard for a Spill-Proof Locomotive Refueling System Barkan, C.P.L. and P. Sargent. 2001. The AAR Standard for a Spill-Proof Locomotive Refueling System. In: Proceedings of the 2001 American Railway Engineering and Maintenance-of-Way Association Annual Conference. Chicago, IL. Files The AAR Standard for a Spill-Proof Locomotive Refueling System - Full Text (PDF) Categories Infrastructure