American Airlines Inc. is increasing the size of its revolving credit facility, which is secured by international routes, airport gates, and takeoff and landing slots at London's Heathrow International Airport, and extending the maturity date to Oct. 10, 2020. American is also extending the maturity of its revolving credit facility, which is secured by international routes, airport gates, and takeoff and landing slots relating to Latin America, to Oct. 10, 2020. US Airways Inc., which--like American Airlines Inc.--is owned by parent company American Airlines Group Inc., is releasing certain collateral that secures its term loans, including some Heathrow-related assets that now secure American's Heathrow revolving credit facility. We are affirming our 'BB+' issue-level ratings on American Airlines Inc.'s Heathrow revolving