there seems to be what looks like a TCC (Turbine Case Cooling) inlet
All that glitters isn't gold !
The scoop/duct you see, (which is also duplicated on the R/H side) feeds air into the "interservices" area. This air cools the area but the main reason for this air is to feed the "Fan Air Metering Valve" which directs air to the pre-cooler, which cools the engine bleed air before being delivered to the airframe.
The first question is, could someone please corroborate this?
The RB211-524G/H-T has no external Turbine Case Cooling system, valves or ducting. There is no "case cooling" as such although Mr Rolls and Royce were smart enough to design internal cooling of turbine discs/blades with the appropriate cooling air being channelled via internal passages including the LP and IP drive shafts.
My second question therefore is, due to the fact that the 524G/H-T doesn't incorporate 2 C duct reverser halves (it's 1 unit), from where would the bypass air be collected from and how would that air be ducted to the TCC inlet?
As there is no case cooling on the G/H-T this question is surperfluous !
