We expect Fort Worth, Texas-based American Airlines Group Inc.'s (AAG) credit measures to weaken slightly in 2017, as a result of lower earnings and heavy capital spending, but they should still support our rating on the company. We are affirming our 'BB-' corporate credit rating on AAG and most issue-level ratings. We are revising our ratings on selected enhanced equipment trust certificates (EETCs) as a result of changes in collateral coverage outside of our previous expectations. The stable outlook reflects our expectation that, despite some near-term softening, AAG's credit ratios should improve in 2018 and continue to support the rating, with funds flow to debt averaging around 20% over 2017-2018. On July 25, 2017, S&P Global Ratings affirmed its 'BB-'