only one cert. as far as i knowsf3boy said:I did not know that Mid Atlantic is on the same certificate as US Air.
I would have never guessed that a single airline could hold two certificates, operate as one airline, as well as two seperate airlines, use different senority lists, but keep a "master" list for recalls, file a flight plan as US Air, operate the flight with MDA crews, call themselves "US Airways Express" to the public/shareholders/pax/CREDITORS, but never classify themselves as "US Air Express" to any other pilot group ever, and use a US Air call sign.