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Gas Turbine Systems Supervisor - Supervisor manual for Gas Turbine Engines | Next
Figure 2-7.—Borescope inspection ports. |
Figure 2-6.—Turbine materials and operating conditions.
stage land 2 turbine ports. Five pressure probes are
cover plate on the aft face, right-hand side of the
located circumferentially around the turbine
accessory gearbox, next to the lube and scavenge pump
midframe at the inlet to the LP turbine. All five probes
(fig. 2-8). When you are inspecting through the
extend radially into the gas path and can be removed
forward-most borescope ports, there is not enough space
to inspect the LP turbine inlet and the HP turbine
for both you and the person turning the engine to work
exhaust.
This requires you to do the turning yourself or to have
INDEXING AND ROTATING THE ENGINE
the turner rotate the engine from the other location on
the accessory gearbox. You can find the alternate drive
You can rotate the engine by using a socket wrench
pad for manual engine turning on the forward face,
with an 18-inch long 3/4-inch drive extension. You
left-hand side of the accessory gearbox, also shown in
attach the 3/4-inch drive extension after you remove the
figure 2-8.
2-6
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