LR and lomapaseo
An independent aviation expert and pilot has stated - in German TV 1st channel - that he has studied the briefings of the two CMīs in depth. The captain has stated that the smell appeared to him not to be ingested and burned de-icing fluid but oil !!
Oil - if heated can release some very dangerous chemicals. Thatīs so his - the experts - statement - is what really happend.
The poisoning scheme of the two pilots fits in an oil contamination and not an de-icing fluid.
Similar - burned oil fumes in tap air - have happened before - with other flights of AB and LH, although the latter seem to denie any comment on that.
As far as I have read the air for the cockpit is normally tapped from the left engine, while the cabin is served from the right. That - if proves correct - will explain why there was nothing detected in the cabin.