Yes Bob, VC10 is correct: Top-of-Climb check.
If needed for wing-bending relief (above a certain weight), Aileron Upset is cancelled by crew (sorry, F/E) action passing FL240 in the climb. The HP Stop Valves are, IIRC, the bleed for the airframe anti-ice, which serves the L/Es of fin. tailplane and the whole wing-span (unlike more modern a/c). HP because (again IIRC) there isn't enough grunt from the LP air on the low-bypass Conway engine. Can't remember any other jet transport with a TOC check, which may explain why it sticks in my mind after 40 years. Sad, innit...
Last edited by Chris Scott; 21st Mar 2013 at 00:31.