Federal FMLA laws do not grant eligibility until the employee has accumulated about one year's worth of work hours in the previous 12 months. So granting new-hires FMLA would be generous on the part of any employer, ie they don't have to do it.

Worth noting that the work hours rule initially did not translate well for crew, because we "only" work about 85 hours/month. The law was actually modified to count duty vice block/credit for crews.

There was still a problem with home reserve not being counted as duty, FA's were really bent out of shape that they couldn't get baby leave if they sat a lot of reserve. Not sure if they fixed that.