I flew on a former TW MD-80 last December from ORD to ATL. Other than the galley carts having TWA logos, the plane's cabin looked like every AA MD-80 that I've flown on the last 6 years or so.
Last week, I flew ORD-TPA-ORD on 2 former TW MD-80s. Unlike the other ex-TW MD-80, these planes didn't have the adjustable headrests. They had the old TW seats recovered in AA's blue seat covers, although the walls, carpeting, and bulkheads were standard AA, and first class had the seats with adjustable headrests.
How come all former TW MD-80s have the standard AA coach seats? Will they ever get them? I really like the adjustable headrests, and I wound up taking the blanket and stuffing it behind my head just to get comfortable.