The phrase 'is about to discuss' is correct and usable in written English.
It is generally used in a sentence to indicate that something is about to be discussed. For example: In his keynote address, the speaker is about to discuss the challenges of transitioning to renewable energy sources.
If your boss does check your work, stall them and start typing to make you look busy - type something like " The following topic of which I am about to discuss via work and documentation is... ...... as it babbles on.
For the first time since declaring themselves to be nuclear powers, India and Pakistan may be about to discuss their differences seriously.India's reversal of policy is dramatic.
On Friday, as eurozone finance ministers were about to discuss Greece's fate, the country's central Bank announced that capital flight had reached €1bn (£739m) that day.
Any claim of fair decision making that does not address the technical issues that I'm about to discuss should strike you as dubious.
I see my function rather as that of drawing you out, possibly pinning you down, chiefly because your reactions to the questions we are about to discuss are of considerable public interest, in view of your position in politics.
The day before the summit set to open Thursday, the European Commission denied reports that the E.U. leaders were about to discuss a credit line of €250 billion, or $308 billion, for Spain whose economy is sagging under a welter of debt.
Ian McEwan's novel "Atonement" became a best-seller earlier this year, but I keep discovering people who were irritated, as I was, by the ending (which I'm about to discuss -- so jump ahead if you don't want it spoiled).
Kate Rothko turned 19 almost four decades ago, in 1970; in some ways, the events we are about to discuss must feel as though they happened to another person, the facts both gilded and blurred by the weight of years.
Pages 5, 8, and 9 of the service manual will be particularly relevant to what I'm about to discuss, I'll include scans of them with a few of my notes.
