Need irule to disable node if http service goes down for any node in pool.

Thanks again ! I have Application Pool X with two nodes - A and B ( both nodes are configured with SharePoint application) i have http health monitor configured below -

Send String : GET /Pages/default.aspx HTTP/1.1\r\nHost: www.X.com\r\nConnection: Close\r\n\r\n Receive String : http|401

Now recently node A had some local http issue and its Http/application pool service goes down, but node A still was online with F5 LTM - now if it happens again ( http service goes down) i want to disable node A -