TWD - what's this all about then?

[flyer]

For more than 15 years, FLYER has been bringing you That Worst Day (TWD) and its stories of Pilot X. The answers have always been published in the same issue for you to see if they agree with your theories and ideas.

Now, in association with Hayward Aviation Ltd, we’re going a stage further and giving you the chance to share your ideas online with other FLYER readers and FLYER AIRPortal users.

Each month we'll take a cross-section of comments and ideas, and discuss them in the pages of the next issue of FLYER. So a round-up of your comments on the June issue’s TWD story will appear in the July issue of FLYER.
Not only that, but over the coming months and years you’ll also be able to look back at any TWD tales providing a great flight safety resource, as well as some great reading for those quiet nights in.

[masterofnone]

Are the stories entirely fictitious, or are they (at least in part) based upon accidents that have actually occurred?