Alpha Sierra,
In answer to your questions I did a little research of the AMM with one of our engineers and this is what we found...
1... Yes, wing anti-ice operates with l/e slats both retracted or extended due to a telescopic anti-ice tube in each leading edge.
2... Selecting wing anti-ice switch position to ON will operate the wing anti-ice system PROVIDING there are no operational mode inhibits as per your post #7 re "Operational mode inhibits".
3... Wing anti-ice only operates in air mode, BUT, you can do two ground tests via the MAT, one with bleed air and one without. The other way is the self test every 24hrs that the aircraft does itself provided the aircraft is on the ground, wing anti-ice switch in auto and pneumatics on.
4... Only l/e slats 3,4 and 5 on the left wing and l/e slats 10,11 and 12 on the right wing are anti-iced.
5... A bit of a head scratcher concerning FCOM item 2.
JammedStab,
That's one of those questions that make you say Hmmmm. Could not find anything to explain as to why. The engineers said bleed air is prioritised to the ADP's to assist the centre hydraulic system electric pumps for flap and gear retraction, and, yes your engine out scenario definitely has merit with bleed air loads increasing on the good engine. 10mins is a long time... but you just never know....
Hope this helps.
McHale.
