The problem is that F is a new business class fare bucket for Avanca. Previously the business class fare buckets were J,C,D,A,K. Several months ago they changed the fare buckets and now the business class fare classes are J,C,D, and F. And now A and K are both economy fare classes. However in true Avianca form they have not communicated these changes to their *A partners, so until they do so any business class flights booked in F are not crediting anything to any *A partner programs.
Ironically economy class flights booked in A or K are still being credited as business class fares to some (if not all) *A partner programs. Back in May I flew an economy class flight booked in K and it credited 150% to my TK account since TK still thinks that K is a business class fare.







Even on expertflyer they still think that A is a business class fare.