Chapter 3
TESTING, INSPECTION, MAINTENANCE, AND
STORAGE PROCEDURES
3.1.
INTRODUCTION
The information in this chapter is important to you because of
its general applicability to gas turbine engines. The information
covers the procedures used in testing, inspecting, maintaining, and
storing gas turbine engines. Specific procedures used for a
particular engine must be those given in the technical manual (TM)
covering that engine
3.2.
THE TEST CELL
Before any engine is shipped to the user, the manufacturer or
overhaul facility has testrun the engine in a test cell to ensure
quality control. The test cell building is usually constructed of
concrete and contains both the control room and engine room, although
in some test cells only the control room is enclosed. A typical test
cell and a control room are shown in figure 3.1. If an engine fails
during a test run or does not perform to the standards set by the
manufacturer, that engine and a specified number of previous engines
are disassembled to check for faults.
Figure 3.1. Test Cell Control Room.
Ground operation, or testing of an engine may also be
performed in the mobile engine test unit (METU). The mobile trailer
unit contains engine testing equipment similar to that available in
an engine test cell. The mobile unit increases engine availability
by eliminating most of the need to return engines to an overhaul
depot.
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