This truss was altered by the original builder to accomodate the HVAC system.
This doesn’t look like an engineered fix. I would note that the truss was modified and suggest that your client request the paperwork. If it can’t be provided then an engineer needs to be called out.
Tim; I agree with Curtis, that little piece of scabb that I see will not cut it for a fix.
Some of these chord members are in compression or tension, so with it cut, something has to give.
Marcel 
Thanks for the reply guys, That was my take on it as well. I may have been mistaken though, I heard that the HVAc contractor made the alteration…
That’s what I thought, I have seen a few HVAC technician alterations which stunned $!@*@ the super :mad: .