Travelers can expect even longer delays at the nation's airports as the FAA announced it will expand scrutiny of passenger planes. More planes are being grounded during a second wave of audits that won't conclude until June 30. An FAA spokesperson said they cannot rule out further groundings after this round of audits is completed.

Just what sort of airline safety violations is the FAA finding?

Roll your mouse over the image below to reveal this aircraft's "problem areas":

" American Cancels Another 900 Flights" - HuffPo "American Airlines Cancels Another 900 Flights" - WaPo