...NEW YORK (S&P Global Ratings) March 27, 2019--S&P Global Ratings today raised its issue-level rating on the US Airways Inc. (since merged into American Airlines Inc.) 2012-2 Class A enhanced equipment trust certificates (EETC) to 'A+ (sf)' from 'A' (sf). We also affirmed our '##' rating on American's 2015-2 Class ## EETCs, and removed the 'UCO' (under criteria observation) subscript from both ratings. The upgrade of the US Airways 2012-2A certificates was based on application of recently implemented "Counterparty Risk Framework: Methodology And Assumptions" (published March 8, 2019) criteria. Under the new criteria, the rating on a liquidity provider supporting an EETC in most instances will not constrain the issue rating on the certificates as much as under the previous counterparty criteria. In this case, the liquidity provider is Landesbank Hessen-Thueringen Girozentrale (A/Positive/A-1). Under the legal documentation for these EETCs, if S&P Global Ratings downgrades the bank to below...