That last sentence is going be the kicker:

"United won a temporary restraining order barring the creditors from repossessing the planes -- prompting S&P last December to warn that $30 billion of airplane-backed bonds sector-wide could eventually be downgraded depending upon the outcome of the court case."

If the Chapman Group prevails, which it looks as though have legal grounds to do so, the market cap of the entire sector could suffer a huge devaluation.