Tail wind 15 kts...
I have one answer, regarding the contradictions between FCOM and AFM as it is stated in the FCOM 0.2.2:
<< The manual is periodically revised to incorporate pertinent procedural and systems information. Items of a more critical nature will be incorporated in operational bulletins and distributed in a timely manner. In all cases, such revisions and changes must remain compatible with the approved AFM with which the operator must comply. In the event of conflict with the AFM, the AFM shall supersede.>>
So now the AFM is clear. As some of you stated it, the aircraft has been tested to 15 kts tail wind (considering RWY length, etc.), but is not approved for 15 kts tail wind in operations.
Thanks to everyone for your comment.
Greetings