Originally Posted by Rayoflight
I was kindly asked by one of the captains in the airline to show him where it says we can use this technique,
You could have asked him where it says you can NOT use this technique!
In my airline we use this high altitude V/S climb as well. It's not described in our SOP's, but it's a procedure being taught during linetraining by all my company's TRI's. It appears to me to be the best way to do heavy weight, high alt climbs in the bus. (Just have to keep an eye on the IAS to avoid a mode reversion, and if you don't, oh well, the "stupid" protections will keep you out of trouble)