With the benefit of hindsight,and sitting over a cup of coffee..
"Captain, Sally here,,the pax seem a bit distraught, as they say they can see the inside of at least one engine"
" Bugger, seems at least one cowl is flapping around, I remember a fatal Danair incident where the stabiliser was hit by part of detached fuselage."
"MAYDAY MAYDAY MAYDAY" request vectors for immediate return and landing!"
"Lets reduce speed now,and make a minimum speed approach to reduce likelihood of cowls exiting airframe,and get on the ground as soon as possible, where we will be given tea n biscuits, and congratulated for being heroes, whilst just doing our job...anything to add or suggest Smithers?"
"No Nigel..that's all clear...just,...oh nothing Nigel"
"Come on Smithers, out with it, it may be vital"
"We'll, may I suggest we don't log on to Pprune for a few days!"
And I suggest,..more or less,...that's what they may have done..
P.s. PAN PAN,PAN PAN,PAN PAN if you like..but I reckon it had potential to suddenly turn critical!