pelmet wrote: ↑Mon Jan 27, 2020 3:42 pm
Guys like the pilots on that airliner probably think along your line of thinking. If you follow the checklist, everything will be fine. Just follow the checklist. But on occasion, an item gets missed.
If you are missing an item, you are not following the checklist. Running a checklist takes some practice and training. It's not just reading from a list and mindlessly regurgitating replies.
You read the item, you flip the switch if required and you verify the switch is in the correct position. Then you continue. It's not a race to go through everything like crazy without checking. If you feel like you need your own checklist to "really check", you are probably rushing the actual checklist in the airplane. If the checklist in the airplane is insufficient, change it.
pelmet wrote: ↑Mon Jan 27, 2020 3:42 pm
How do I know that? Because I have missed an item on a checklist....and more than once. Then there are situations like contaminated runway ops, where the checklist is done but the flaps are left up until holding short of the runway. Then the flaps are extended. Until someone forgets.
Different checklist for deicing conditions exist. If you follow a checklist, you will not "forget" an item.
pelmet wrote: ↑Mon Jan 27, 2020 3:42 pm
From an airliner point of view...….If only they had done similar to what I recommend close to lining up such as....speedbrakes stowed, flaps set, stab trim set, rudder trim set, v-speeds visible, LNAV and VNAV armed(or whatever is appropriate for your aircraft)(some are not killer items but can create an issue). A lot of people would be alive. It takes a little over 5 seconds and is not a checklist. Some would rather engage in non-pertinent discussion during the 10 minute wait for takeoff or enjoy watching the airliners land, etc. Usually, that is still possible.
In a multicrew environment that is dangerous advice. If one crewmember suddenly starts to run his own checklist when you are expecting to start the take off roll or when you are lining up the lane. That creates confusion in a multi crew cockpit.
Even single pilot, this only makes sense if you don't trust the checklist. In that case the remedy is "change the checklist" not "invent your own"
That final check is called "line up checklist" or "before take off checklist". Follow it.
I have the impression that the root of your argument boils down to: "people make mistakes when running a checklist, so run the checklist twice to catch the mistakes".
Let's put some random numbers on it to make a point. Let's say a pilot misses 1% of the items when running a checklist. If you run the checklist twice, the chance of forgetting that item is 0.01% according to that philosophy.
However, what will really happen is that people will not pay attention to the checklist anymore if they have to run it twice. So you might get 10% of missed items on the first run, and maybe 20% of items on the second run. That gives you a 2% chance of a mistake versus running the checklist just once accurately.