LINK. American Airlines’ three largest unions have agreed to support a possible takeover offer from US Airways Group Inc. (LCC) rather than remain independent, three people familiar with the matter said. The groups plan to say that they believe they can reach better terms with US Airways than what they expect if American parent AMR Corp. (AAMRQ) exits bankruptcy by itself, according to the people, who asked not to be identified because the talks are private. The labor consensus has emerged as Fort Worth, Texas-based American prepares to ask a federal bankruptcy court on April 23 for permission to void existing union contracts and impose new terms in its quest to cut 13,000 union jobs. A ruling on the request may not occur until early June.