Shutting down engines after flight
After many years on type (737) it was recently mentioned to me on a line check that the company SOP on arrival was to shut down each engine one at a time, so as to be able to monitor their shutdown. I was still in the habit of shutting them all down together as a hangover from my previous airline.
Whilst I am perfectly happy to abide by the wishes of my present employer I am curious which way is the more usual (on any a/c type) and if there is any real advantage to shutting down the engines one at a time. I would have thought that shutting down the engines was a very low risk exercise and also that any abnormalities would be better highlighted by viewing all engines parameters together ie by playing “spot the odd one out”.
Which way is more common and is there a good reason for doing it that way?
S&L