Originally Posted by
tdracer
The 747-400 Combi's were certified before the regulations were changed. Once certified it remains certified even if the regulations change - new regulations are not retroactive. The only thing the feds can do once a configuration is certified is to issue an AD if they believe an unsafe condition exists.
EVA also operated 747-400 Combi's (I once flew on one between Seattle and Taiwan), although I don't know what eventually became of them...
As always, thank you for the info td. I hope retirement is treating you well.