Cornish-stormrider,
You are nearly correct, 36 degrees for the datum switch and 24 degrees for the selection of combat.
I have to own up to being the "brave" chap from Leuchars UETF that trashed your test bed. In fact two days previously I had trashed our own test bed in much the same way! Eventually turned out to be the RHFCU at fault, or more accurately the turndown actuator. Hell of an expensive way to find out though eh?
Three of us travelled north from Fife to meet the engine and there was standing room only in the running cabin...the three of us and most of Lossie's test bed crew. All was going well and we were describing the fault and how it happened to the local team, when I uttered the unforgettable words " and just about now it might go b.......ANG!!!!!"
Cue lights and paint falling from the ceiling, squeals from the Lossie boys and lots of nervous chuckles! Underwear checked...satis, honour satisfied!
The Leuchars UETF was out of action for several weeks and the repairs cost an estimated £60,000. I'm not sure Mr Brand ever forgave me for trashing his UETF!
Happy days!