Originally Posted by
Denti
I would argue it depends if you follow the newer Airbus SOPs of single engine taxi for departure (either with APU or without), which then makes it necessary to check them during taxi as you can only really do a flight control check with both engines running. And yes, it depends obviously depends on operational experience on the aircraft type as well.
Good point.
The thing is, I am now retired and my last type was the 777 and some of my manuals like the OM-A are no longer regularly updated, so I can’t say with certainty what our OM-A currently says.
I can say though that our current A350 FCOM has flight control checks as last item on the After Start checklist, even though it does state in the one engine taxi SP that the F/CTL check has to be performed after the second engine start, as you already mentioned.
I can only surmise that the same policy in the OM-A applies as with any F/CTL check that may need to be performed for whatever reason (i.e. after de-icing) during the taxi phase, where it stated that it had to be performed with the parking brake set.
Having said that, when I left we did not do single engine taxi out, as we operate primarily long haul and the engine manufacturers were up in arms about higher thrust settings on the operating engine(s) during taxi. Original GE comment: ‘at high thrust settings on TWYs the engine works like a vacuum cleaner sucking all sort of debris and dust through the core.‘
B.