I’d like to know how smoke from the fire in the engine got into the cabin. I thought the cabin was pressurized at around 6,000 feet and would push out any smoke from outside. They need some silicone or something to fill in the cracks.
It gets in because the air they pressurize the cabin with comes from the engines.
I don’t recall exactly where or how, but obviously ahead of where the fuel is normally injected.
I am sure an A&P Mechanic will be along shortly to clarify. (And make me look stupid..LOL)
The ventilation for the cabin comes from one of the compressior stages in the engines.
The smoke came from there.
Aircraft use bleed air from the compressors on the jet turbines to pressurize the aircraft and ventilate the cabin. Damage to the bleed air system would (and does) cause that.