PAXboy:
to explain the roll-spoiler thingy:
(bare in mind this is from nearly 2 decades ago, so my memory is under severe stress here!)
When operating with a complete loss of yellow system hydraulics, on approach it was recommended that, in order to prevent assym. spoiler float, the roll spoilers be deliberately fully deployed by a short application of full aileron in either direction. There is no hyd. pressure involved - they are unlocked by wheel position (10degrees?) and aerodynamic pressure deploys them to full up. That way you know what position they are in; no suprises on finals. From having flown in close formation and watching as it was done into Chester, believe me, it works.
Don't know if that's still the procedure, or if it was just our military way of doing things (although it's in one of my airline QRH's as well), but better the Devil you know, as it were....
Help me out, those of you still flying the 1-fuselage4-engines6-wheels....
