Good on you for having a go and writing it.
Re the 'grammar police', though, if the aim of the game is to set an example to others as well as sell your book, surely you should take care editing an excerpt you're going to post on the web.
Even the thread title, Auto Rotation, should really be Autorotation.
Exhilarating, not exhilerating.
wasn't, not was'nt.
If power had been restored, why was it only 'just enough to keep us airborne'?
If the pilot had got it just right, why did they hit with such an almighty thump?
These are the things your readers will pick up, so best to do it before they do!