"Tarver Engineering" 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?