NEW YORK (Standard&Poor's) Feb. 14, 2013--The merger agreement announced today by AMR Corp. (D/--/--) and US Airways Group Inc. (B-/Positive/--) has no immediate impact on our ratings of either company. We will evaluate the merger (which is subject to regulatory review and other conditions) and how it fits into AMR's plan to emerge from bankruptcy, and we could place ratings on CreditWatch as further details of the merger plan and how it affects AMR's reorganization become available. Our analysis will focus on several aspects: AMR's credit quality when it emerges from bankruptcy, based on changes implemented in Chapter 11; The effect of the proposed merger on the business risk and financial risk profiles of the combined entity; and