Originally Posted by
MemberBerry
I understand that the memory items are so time critical that you need to be able to perform them immediately. However, when such a procedure contains "ifs" that require you to check if the problem stopped before progressing to the next step, even if you do everything in complete silence without any communication 5 seconds doesn't seem enough.
I found a study called "LINE PILOT PERFORMANCE OF MEMORY ITEMS" on the FAA's site that discusses among other things two conflicting concerns regarding performance under stress: doing things as fast as possible vs doing things as accurately as possible:
https://www.faa.gov/about/initiative...mory_items.pdf
This was also demonstrated in the Ethiopian flight, with the pilots forgetting to disable the auto throttles as part of the runaway stabilizer memory items.
The entire study is a very interesting read. Sorry if it has been posted here before, I searched the thread and I couldn't find it.
I have not read that particular study before, but there are several focusing on errors in checklist processing. This one is quite thorough. Summary version, and full paper:
https://flightsafety.org/asw-article...er-error-trap/
https://human-factors.arc.nasa.gov/p...010-216396.pdf
Checklist deviations clustered into six types:
flow-check performed as read-do;
responding without looking;
checklist item omitted, performed incorrectly, or performed incompletely;
poor timing of checklist initiation;
checklist performed from memory;
and failure to initiate checklists
(in order of number of occurrence)
The first two types accounted for nearly half of the checklist deviations observed.
Monitoring deviations grouped in three clusters:
late or omitted callouts,
omitted verification,
and not monitoring aircraft state or position
Although this study focused mainly on checklist use and monitoring deviations, additional data on
primary procedure deviations provide context and allowed us to examine how effective checklists
and monitoring were at trapping primary procedure errors