As reported elsewhere, AA started converting Flight Credit from cancelled travel to Trip Credit. This seems to be more or less a one-time exception to their standard policy in order to make it easier to redeem unused travel credits (but since almost nothing AA does is truly benevolent, I'd guess the end goal here is to divert calls from people trying to redeem flight credits away from AA's overloaded call centers). If you contact AA, I'd guess that they'd be willing to convert your Flight Credit to a Trip Credit.