Figure 2-6.—Turbine materials and operating conditions.stage land 2 turbine ports. Five pressure probes arecover plate on the aft face, right-hand side of thelocated circumferentially around the turbineaccessory gearbox, next to the lube and scavenge pumpmidframe at the inlet to the LP turbine. All five probes(fig. 2-8). When you are inspecting through theextend radially into the gas path and can be removedforward-most borescope ports, there is not enough spaceto inspect the LP turbine inlet and the HP turbinefor both you and the person turning the engine to workexhaust.This requires you to do the turning yourself or to haveINDEXING AND ROTATING THE ENGINEthe turner rotate the engine from the other location onthe accessory gearbox. You can find the alternate driveYou can rotate the engine by using a socket wrenchpad for manual engine turning on the forward face,with an 18-inch long 3/4-inch drive extension. Youleft-hand side of the accessory gearbox, also shown inattach the 3/4-inch drive extension after you remove thefigure 2-8.2-6
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