Delta is prohibited from selling or transfering any Comair aircraft with the exception of 50-seat lease expirations and any airframe that is damaged beyond economical repair.

This according to the concessionary pilot agreement '07, and expires on March 2, 2011.

I don't know how Delta has "loaned" Comair aircraft to Mesaba, SKW, or Pinnacle for "Paint Shop Spares", as this seems to go against the contract. Apparently ALPA doesn't want to investigate it and would rather fight over a downgraded Captains fourth stripe jeopardizing flight deck safety.