There's one or two months a year that AA does not hire which means no WO flows. As far as union projections go, this seems to have the effect neutralizing the fact the union doesn't account for non-flow attrition which is why the union numbers are closer to being right than the company's.

Last year (or was it the year prior), AA did not hire for one month then hired double the norm on another month. Given our flow agreement is tied to lesser of a number per month or percentage of class per month, this had the effect of AA getting all the pilots they needed and letting the WO flow half as much over the two months.

But yay! We have flow!