Silberfuchs....that Sir, is complete rubbish!
I suggest you break out the dictionary! that should be a good start!
Obviously you're unsure of the meaning of "rumour"
Here let me help you out.....
Rumour n. a circulating story or report of DOUBTFUL truth.
Your 'rumour' on how to do it is no where near SOPs (NPs).
Screaming be'jesus!
that's why I said rumour. You could have just quoted the Airbus NTC and FCTM to dispel the rumour