Graw, you may recall, is the former MTA construction executive who claims that, in part because he prepared the special panel of experts that rejected a certain dubious bid for a $65 million Eastside subway contract, he was fired out of hand in 1996. As we noted last week, that Metro East contract — 20 percent of which was to go to TELACU and Cordoba Corp., firms helmed by ancient Richard Alatorre cronies David Lizarraga and George Pla — was, Graw alleges, wired to a new $13,200 tile roof on Alatorre’s house in Eagle Rock. The roof, courtesy of TELACU, was invoiced a week after Graw was fired and days before MTA chief Joe Drew tried to toss out the Jacobs Management Associates bid that had been recommended by an independent MTA panel in favor of the Metro East bid backed by Alatorre.But Graw contends that’s not the only reason he was deep-sixed. According to papers in the suit, he was also fired for acknowledging an even bigger, costlier problem. Graw had dared to talk at a public meeting about a two-year epidemic of more than 2,000 MTA contract change orders (a chan