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22 Inspection and Maintenance: 22.1 Cold-End Inspections

This document discusses inspection and maintenance procedures for gas turbine engines. It describes how to check for damage in inlet guide vanes, compressor casings and blades, and turbine blades using manufacturer limits. It also details replacing oil seals to prevent leaks, special precautions for repairs involving thorium, and using specialized equipment for internal inspections to monitor engine condition and trends over time.

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Anonymous p8HJKJTaFa
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34 views1 page

22 Inspection and Maintenance: 22.1 Cold-End Inspections

This document discusses inspection and maintenance procedures for gas turbine engines. It describes how to check for damage in inlet guide vanes, compressor casings and blades, and turbine blades using manufacturer limits. It also details replacing oil seals to prevent leaks, special precautions for repairs involving thorium, and using specialized equipment for internal inspections to monitor engine condition and trends over time.

Uploaded by

Anonymous p8HJKJTaFa
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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22 Inspection and Maintenance

22.1 Cold-End Inspections

22.1.1 Using given data, determine permissible limits of damage and repair criteria on inlet guide vanes,
compressor casings, stator blades, rotor blades and fan blades.
a

22.1.2 Identify lifed cold end components and determine their lives in terms of hours or cycles as
appropriate.
A

22.1.3 Detail how internal clearances are checked.


A

22.1.4 Describe the adverse effects of oil leaks from bearing seals in the cold section and use
manufacturers data to describe how oil seals may be replaced in service.
A

22.1.5 Detail the special precautions to be taken when carrying out repairs to light alloy castings containing
thorium.
A

22.2 Hot-End Inspections


22.2.1 Using given data, determine limits for damage such as cracking, warpage, burning, erosion and hot
spots in an engine combustion section.
A

22.2.2 Using given data, determine damage and repair limits for typical turbine blades/wheels, turbine
case, turbine vanes and exhaust section.
a

22.3 Internal Engine Inspection

22.3.1 Describe the use of specialised equipment designed for internal inspection of engines.
a

22.3.2 Specify the principles pertaining to engine condition and trend monitoring. Determine engine
condition from given data.
a

22.3.3 Describe typical operational checks, tests, calibrations and adjustments associated with the in
service replacement of the following components:

a. Fuel control unit


a

b. Fuel control governor


a

c. Torque-meter pump

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