A RIO, HSL or 12X loop has switched to its alternate path. This is an informational SRC only. Word 7 of the SRC contains the loop number in the leftmost 4 digits. The loop number is in hexadecimal format. You must convert the hexadecimal loop number into decimal format to recognize the loop number. This SRC can be caused by a tower on the RIO, HSL or 12X loop powering off. This SRC may also appear in a Serviceable Event View you are using, with a B700 6982 or B700 6981 logged at approximately the same time. In that case the other SRC is reporting a failure and this SRC is reporting that the alternate RIO, HSL or 12X path is now being used. Service the other SRC if present.