Ah, I see - no worries. I hope bubbers44' neighbour is open-minded and willing to learn a bit.
I'm interested in your note regarding the FCTM.
First, I know that each airline determines for itself, within applicable limits, how it will operate a manufacturer's aircraft. A few decades ago, we used to re-write the manuals entirely and heaven help someone who transitioned from one airline to another. Today, most airlines adopt the Boeing and/or Airbus ramp-to-ramp SOPs with type-specific modifications.
The FCTM is, as you say, more a resource than a manual and any disagreement between the AOM and other manuals is resolved in favour of the AOM. First such manual I saw was for the B727 around 1983. We've used a type of FCTM for years - the present Airbus one is a very helpful document. As you would know, it can be supplied by the manufacturer, earlier, moreso from Airbus than Boeing, and then modified to accommodate airline-specific procedures. The ones I've seen are very close in their presentations and procedures. The present response to the UAS showed up in about 2007, with the flow-schematic which included the 'do not do the memory items' qualification. IIRC I posted an image of the flow-chart.