The DC-9 that crashed on flight 592 had just come out of a heavy mx inspection from a company called Sabretech in Southern Fl. Then a division of Sabreliner Corporation based in St. Louis. Among other things, they found that the chemical oxygen generators that were replaced had been put in the forward pit, and not properly capped or discharged. In the forward hold a main gear tire was also placed on top of them. Tires and other parts are common when going to an outstation. One of the uncapped generators was "ignited". Basically, these things mix a couple chemicals and the exothermic reaction creates oxygen for the cabin masks. They also get incredibly hot. These ignited and the fire was fed by the pure oxygen while getting hotter as the result of the tire and other stuff in the hold.

Sabretech was noted in the NTSB report a number of times. Most of the work was done by non-certified employees under the "supervision" of an A&P. The removed generators were not properly tagged, and shouldn't have gone on the plane because they were comat.

I did a lengthy report on this one for an aviation safety class back in college. I have the report, all 600+ pages, in a binder and have read it cover to cover a couple times. It's amazing how many times this could have been averted but sadly wasn't. The other amazing thing is how in almost every aviation accident this is the case.

JetBlue and America West, like other 121 carriers in the US have had great safety records in recent years. I wouldn't be worried about flying on them, or any other carrier here. However, be aware that you get what you pay for and if you want cheap tickets this is what you get.