In Flight Test Card I have marked a row "Test plan no: Flight #4 / 15". I am sure that " 15 " is a sequence number taken from the other table "Schedule of flights". Test point number 15 is described there as "handling of ailerons", exactly the same issue as on the other side of Flight Test Card. But I do not think that "Flight#" is actual flight number that is flown. As you can see in "Schedule of flights", one number can be repeated several times, then you can have another one for a few sequences after which the previous number is back. I am enclosing a screenshot of another page of this table.