LOW PRESSURE COMPRESSOR RUBS OR BINDS WHEN TURNED BY HAND AND MORE THAN ONE HALF OF THE ACCESSORY GEARBOX (AGB) MAGNETIC PLUG IS COVERED WITH METAL CHIPS.

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3 - 2 . TROUBLESHOOTING - CONTINUED

( 3 ) E S - 3 0 . LOW PRESSURE COMPRESSOR

h. LOW PRESSURE COMPRESSOR -

RUBS OR BINDS WHEN TURNED BY

CONTINUED

HAND AND MORE THAN ONE HALF OF

THE ACCESSORY GEARBOX (AGB)

M A G N E T I C PLUG IS COVERED WITH

M E T A L CHIPS.

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

of low pressure compressor rubbing or binding when turned by hand, when

more than one half of the AGB magnetic plug 1s covered with metal chips.

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 position No. 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, binding will be felt when the

low pressure compressor is turned by hand. The AGB acts as an oil sump

to collect oil which is scavenged from bearings in the forward engine

module and rear engine subassembly. The main oil pump pumps the hot oil

from the sump to the engine oil cooler. The art on this page provides an

overview of the s y s t e m d e s c r i b e d a b o v e . Refer to this page along with

in-text art while performing troubleshooting.

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