Roughly 13 years ago railfans received a rumor of 4 F-Units being purchased by Norfolk Southern from a charter engine company. Soon these engines were repainted and refurbished to NS livery for their business or office car special ( OCS for short) train. However, with the recent implementation of precision schedule railroading (psr), Norfolk Southern has been making fewer, longer trains to save money. If your wondering the affect this had on the F-Units, let me explain. When NS started cutting back to save money, this included getting rid or storing no longer needed engines. And four old passenger engines with worse fuel efficiency standards than newer freight engines that could easily do their job isn't what you call "money saving". So, after 13 years of duty under new owners, these railfan favorite engines have had their career come to an end. I have never had the luck to see them myself though they've been through where I live. These engines only chance of riding the rails again is if another company guys them from Norfolk Southern's auction, which is possible that BNSF would since their the only railroad without special engines for their OCS. Thanks for reading my post, and to the railfans that saw the F-Units in person, I hope you got pictures.