SYSTEM PYLON INTERFACESThe following system connections are connected with the engine to the pylon interface, on the RH side: - core zone fire extinguishing line, - hydraulic reservoir pressurization air tube (engine 1 only), - sense line connecting Pressure Regulating Valve (PRV) to Thermostat Solenoid (THS) of engine bleed air system. The sense lines connecting to the bleed Regulated Pressure (Pr) transducer and the Transferred Pressure (Pt) transducer interface with the pylon on the LH side.