ok. that report begs for more questions than it answered. How does engine bleed air get into the cabin because of a ruptured duct? With all the fire detector loops around said ducts, EICAS would have told them what happened and they could have quickly closed the bleed valves from engines and even turn off that pack.
Can someone fill in the blanks?
Also, ATL-RDU is a huge market pair. More medallion FF in RDU than anywhere else outside ATL.