I would imagine TUI have been looking at this for some time now as the S20 IT flying program has to be put to bed by now - So these decisions have to be ''do we bite the bullet now or not....''
The MAX ACMI debacle has cost TUI £600m so far....ouch
ACMI airlines like Titan have expanded their fleet largely for Jet2's work for next year.
TUI's new holiday jet fleet was pivotal on 757 and maybe 767 retirements which should have been completed by now -
TUI have now to decide whether again to still hang on to as many 757's as they can - No doubt expensive MX and C checks are due on the 757's - do we pay for those or do we wait?
Also TUI have some 757's due to be sold on for freighter conversions so they may have to let those go contractually - infact one went this week.
As for Ryanair - I think they are in a different position as they do not sell package holidays but their route expansions must be on hold....
Enter Air and Smartwings also have grounded Max but they are not as badly affected as TUI