CSX 7311

When CSX 7311 was rebuilt in November of 05, a lightning bolt was applied under the number on the cab, CSX’s symbol to indicate an AC unit, but then was later removed. Why was it applied in the first place? A simple mistake?

http://www.rrpicturearchives.net/showPicture.aspx?id=237605

Someone goofed. Hardly news with the way things are going these days on CSX.[banghead][D)][zzz]

OK.