AAR90 - I wasn't going to reply as we are sort of straying from the topic, but, what the heck! I just can't help myself.
I presume you don't take-off with the speedbrake ARMED, too noisy that audible warning!
From recall (and remember I have killed quite a few braincells on layovers over the last 36 years), moving the speedbrake lever to the ARMED position signals the spoiler panels to extend automatically after landing. The speedbrake lever moves to the UP position and the spoiler panels (flight and ground) extend when all of the following conditions occur:
-there is hydraulic pressure to both landing gear truck tilt actuators
-both truck tilt sensors detect a no-tilt condition (aircraft on ground)
-both thrust levers are at idle.
Perhaps this explains why you did not experience uncommanded spoiler deployment when you had truck tilt problems?
I am very interested in the reasons for the truck tilt problems you experienced. I can only remember one problem in this area with our 767s in their 17 year history and that was due to the non-fitment of a safety bolt after a wheel brake unit change.
As I said before, things mechanical on the 767 are a little hazy as I left it over 2 years ago when they were converted from 3 to 2 crew. I did manage 10 years and over 6600 hours though, so a few things have stuck and perhaps can be filed under "Useless Information".