Figure 12-25.--Gas turbine engine test stand.
Gas Turbine Engine Analyzer
The UPUA4-1 gas turbine engine analyzer (fig.
12-27) is a lightweight, portable testing unit. The
are mounted in a case. The cover of the case contains
storage space for the analyzer cables and a very
sensitive pressure gauge. Attached to the cover is a
schematic wiring diagram and a speed conversion
chart to convert tachometer rpm indications to actual
engine rpm for the different engines that can be tested.
The analyzer incorporates an electrical system
with associated meters and indicators. Fuel, oil, and
pneumatic systems with associated gauges and
controls for checking and controlling performance of
gas turbine units are also provided.
The analyzer should be used only by personnel
Figure 12-26.--Engine mounted on 281270-0-3 portable
thoroughly trained in its use and who are familiar with
t h e a n a l y z e r 's t e c h n i c a l m a n u a l , N AVA I R
where limited space prohibits the use of the universal
19-105BC-1. Personnel should also be familiar with
test stand. This stand also uses the mounting adapters
the use of common electrical test equipment. This type
noted earlier in our discussion of the gas turbine engine
of background is required to accurately analyze the
A good working knowledge of the electrical, fuel,
oil, and pneumatic systems and components for the
Prior to an engine operating test run, ensure that the
particular gas turbine engine being tested is a
engine is securely mounted in its enclosure or a test
prerequisite for satisfactory use of the analyzer and
correct interpretation of results. Constant reference
indicate operating conditions. Check all plumbing
should be made to the applicable technical manual for
and electrical wiring for routing and security.
electrical and pneumatic schematics and engine
Check the fuel and oil tanks, and fill, if necessary.
performance requirements for the engine being tested.
Ensure that all test setup switches and valves are
placed in the proper positions.
The analyzer may be used while the engine is
installed in its service installation; the battery of the