As I understand it, the only out-and-out failure was on a MDW
flight in 2001. The other (mentioned) incidents were precautionary (if required) shutdowns due to mechanical abnormalities.
Mx is awesome. Safety truly comes first, regardless of cost. The Saabs are built like tanks if you compare the unrelentingly hard use they see and relatively rare failures.
I guess today's incident explains the nearly 40 minute taxi time for our morning arrival from MDW
Above all, I'm glad everyone is safe and the aircraft escaped relatively unscathed -- thus preserving ATA's excellent 30 year safety record.