Im probably miles out here, but I thought that most 75/76 took off with a de-rated power setting, many for noise abatement, and didnt go to full climb thrust until 3000ft at which point they would engage hdg/spd and select the vnav mode? Typical of Manchester R24? StockportRomeo1 SID? Im still learning so am not an authority, just here trying to learn!! Thanks for your time.
Regards to you all.