It loks to me like the ACARS FLR messages have supplemental data fields (some of which are pobably truncated on the leaked printout).
Could somebody explain what (if any) the significance of an 'X' is in the supplemental data fields. As an example one of the failures is:
Code:
34111506EFCS2 1,EFCS1,......
compared to the following entry (line higher on the printout):
Code:
27933406EFCS1 X2,EFCS2X,......
Thanks, John.