"John R Weiss" wrote...
I have never read about "a spoiler flap in a speedbrake configuration"
in any textbook. Anyone else?

You might want to look at the recorded parameters for the DFDR on your
747-400.

Sorry, but they don't let me bring home a DFDR. Exactly where would I find a
reference to "a spoiler flap in a speedbrake configuration," and in what
context?


Also, I just looked through 14CFR Part 121 -- including 121.343, 121.344, and
Appendices B and M (the FAA standards for Flight Recorder and DFDR operational
parameters) -- and found absolutely no reference to "spoiler flaps" in ANY
configuration.