LOW PRESSURE COMPRESSOR RUBS OR BINDS WHEN TURNED BY HAND AND RUBBING OR BINDING IS FELT WHEN TUBEAXIAL FAN BLADES OR LEFT COOLING FAN BLADES ARE TURNED BY HAND.

TM 9-2835-255-34

3-2. TROUBLESHOOTING - CONTINUED

h. LOW PRESSURE COMPRESSOR -

(2) ES-29. LOW PRESSURE COMPRESSOR

CONTINUED

RUBS OR BINDS WREN TURNED BY

RAND AND RUBBING OR BINDING IS

FELT WHEN TUBEAXIAL FAN BLADES

OR LEFT COOLING FAN BLADES ARE

TURNED BY BAND.

This section contains troubleshooting to locate and correct the cause(s)

o f l o w p r e s s u r e c o m p r e s s o r r u b b i n g o r b i n d i n g w h e n t u r n e d b y h a n d , when

rubbing or binding is also felt as the tubeaxial fan blades or left

cooling fan blades are turned by hand. The low pressure compressor is

mechanically coupled to the low pressure turbine rotor in the rear

engine subassembly. If there is damage to the low pressure compressor or

p o s i t i o n N o . 1 or 2 bearing in the forward engine module, or to the low

pressure turbine rotor or position No. 5 bearing in the rear engine

subassembly, b i n d i n g w i l l b e f e l t w h e n t h e l o w p r e s s u r e c o m p r e s s o r i s

turned by hand. The power turbine and reduction gearbox (RGB) are

coupled mechanically through the power shaft. If there is damage to the

p o w e r t u r b i n e , rear engine subassembly position No. 6A or 6B bearing o r

RGB bearings and/or gears, b i n d i n g w i l l b e f e l t w h e n t h e t u b e a x i a l f a n

blades or, left cooling, fan blades are turned by hand. The art on this

page provides an overview of the systems described above. Refer to this

page along with in-text art while performing troubleshooting.

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