Just as a note, there is a widget specific FB page about disability and sick leave, with plenty of people contributing their experiences - search for Widget Pilot Disability/sick. Also, I think the company had a recent forum about pilot disability on Skyhub. Just search of the flt ops news for "disability"

In my experience, they get you back on payroll very quickly - depending on sim availability it can be very quick to get back to the line, so only get your medical and paperwork ready when you're really ready.