Originally Posted by
rickair7777
Yes, something would have had to burn to produce CO. I can think of a few remote possibilities...
Oil leak in a compressor bearing ahead of the 10th stage might get heated enough by compression to burn and create CO...but you'd think it would also make smoke and bad smells.
Another possibility would be an oil leak in the left pack at a point where it could come in contact with hot bleed air. Since it seemed to affect the cockpit only that would mean it would have to come from the left bleed or pack. But again, no smoke?
They were on climb out, so engine power (and bleed temps) would be high.
I would rule out something in the cargo compartment since it only seemed to affect the cockpit.
Actually this is really weird...I can't imagine how there would be any trace of CO left by the time they shut down th engines, opened the doors, unloaded, and got somebody out there with a gas analyzer. The cockpit fans should have flushed it all out. I almost suspect that the CO was from a nearby operating GPU?
Maybe they were poisoned by burning oil additives, not CO.
I was wondering all of these above points.
The article did mention a small amount of CO, so maybe it was something from the ground after they opened the door. Maybe there was a pressure issue of sorts, but again it seems like the rest of the cabin was unaffected so it's tough to say. This is a really odd situation.
Maybe they have an aftermarket heater in the nose and that was leaking CO
