Tue Jun 08, 2021 5:56 pm
#1851846
VRB_20kt wrote:Incidentally, why (and how) are you checking the primer? It's something you will never use in flight and to check it seems to me to be introducing a possible mode of failure. It's locked and checked prior to take off. How will its status have changed?
It's never happened to me, but if somehow the plunger got rotated, the lug on the side of the barrel could line up with the gap and the plunger work its way out.
So I check it with a brief pull to make sure it doesn't move.
I could equally argue that there's no need to check the flaps, mags or master downwind that I saw in someone's list. I don't lower the flaps in the cruise or the join, so why would they be different from then.
Likewise why would I switch a mag off so why look at the switch? And I've just called overhead and downwind, of course the master is on.
Some of these things are in the list I suspect in case you've done something stupid and you get a final check. Parking brake and cabin heat are pretty close to the carb heat in the Grummans, I've never pulled the wrong one in flight yet, but it could happen.