Atlas N 40005088 DCC Sound Burlington Northern SP&S #4112 FA-1 Diesel Locomotive August 15, 2026 By 0 At the height of cab units, this was ALCOs foray into the market. Over 600 were built from 1946 to 1956 with 400 of them being FA units. DCC equipped. Dual mode DC and DCC operation. Supports all DCC programming modes.