In your case safety is affected so:
Memo items, Flight path stabilisation, then ADR check procedure.
If all sources affected, and assuming you want to divert:
1) Set Climb thrust and set flaps 1 after 2-3 seconds. Continue acceleration.
2) As the pitch reduces below the setting for 1 and while keeping level path, clean up.
3) Set pitch/thrust for clean conf.
For the other question...As a rule of thumb zero pitch for descent will not stall your aircraft with flaps extended. But it may be a lot. Check with GPS alt.
But I would configure long final with conf3 gear down and establish the glide...being 4000-5000ft, no problem at all.
And this is only if you lose the speeds before clean up. There is no reason for climbing more than 5000-6000ft if terrain is flat. All other cases you are already with clean aircraft.
Last edited by Lantirn; 21st Nov 2016 at 22:02.