DOC AIRBUS | AMM A320FTURBINE EXHAUST CASE (TEC) - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
A. Turbine Exhaust Case (TEC)
(1) The TEC assembly is a main structural part of the engine and attaches to the rear flange of the Low Pressure Turbine (LPT). The TEC assembly functions as a support for the No. 5 and No. 6 bearing assemblies and has connection points for the aft engine mounts. There are bosses in the outer wall of the TEC for four Exhaust Gas Temperature (EGT) probes that extend into the gaspath.
(2) The TEC is a one-piece case welded structure with ten airfoil-contour vanes (struts) which hold two bearing housings at its inner flanges. The No. 6 bearing is an oil-damped type in which a layer of pressurized oil around the bearing outer race absorbs engine vibration. The scavenge oil tube and bearing pressure oil tube go through the bottom struts of the TEC to supply oil to the No. 5 and No. 6 bearings.
Turbine Exhaust Case (TEC) ModuleA. The turbine exhaust case contains the No. 5 and No. 6 bearings.
(1) These are roller bearings which hold the rear of the LPT radially.
(2) The No. 6 bearing is of the oil-damped type in which a film of pressurized oil around the bearing outer race absorbs engine vibration.
(3) Oil leakage is controlled by a ring-type carbon seal at the front side of the No. 5 bearing.
(4) No. 5 and No. 6 bearing pressure oil and scavenge oil tubes go through the bottom struts of the TEC.