TM 11-5840-281-35/1
CHAPTER 4
DIRECT SUPPORT TESTING PROCEDURES
Section I. GENERAL
test are contained in the respective test procedures.
4-1. Tests and Procedures
Perform the tests in the order presented and follow the
procedural steps in each test in the order given. Set all
The direct support testing procedures are used
controls as accurately as possible.
by direct support maintenance personnel after equip-
ment repairs are completed and the system aligned to
NOTE
determine that repaired equipment is performing
satisfactorily for return to equipment users. The tests in
this chapter are used to check the equipment
Direct support testing procedures contain
characteristics that can be tested with the tools, test
instructions to position elevation Antenna AS-
equipment, and materials allocated to direct support
1291/TPN-8 and azimuth Antenna AS-1292/TPN-8
maintenance by the maintenance allocation chart (TM
manually. When in a precision scan (SCAN
11-840-281-12) and the maintenance support plan. The
MODE switch on master Control-Indicator C-
testing procedures are grouped in the following section II
6988/TPN-18 placed to NORM, 35 EL, or 60 AZ
and section III. Section II contains all teats for units of
positions), elevation Antenna AS-1291/TPN-8 and
the radar set group. Section III contains all tests for units
azimuth Antenna AS-1292/TPN-8 may be posi-
of the Control-Indicators C-6988/TPN-18. Each test in
tioned by hand by rotating knurled end of elevation
both sections is preceded by a list of test equipment and
Antenna Drive TG-114/ TPN-8 drive motor shaft
materials required to perform the test, equipment
(located under red cover on right side of elevation
conditions that are a prerequisite to accomplishing the
Antenna Drive TG-114/TPN-8 as viewed from front
test, references to test connection diagrams as
of Radar Receiver-Transmitter RT-818/TPN-18).
applicable, and any special instructions required to
perform the test.
Instructions for connecting and
operating the test equipment required for each
Section II. RADAR SET GROUP TESTS
4-2. General
4-3. Physical Tests and Inspection of Radar Set
Group
This section contains all direct support maintenance
tests for the radar set group. The radar set group
a. Test Equipment and Materials Required.
includes Radar Receiver-Transmitter RT-818/TPN-18,
None required.
elevation Antenna AS-1291/ TPN-8, azimuth Antenna
b. Equipment Conditions.
AS-1292/TPN-8, elevation Antenna Drive TG-114/TPN-
(1) Radar Set AN/TPN-18 turned off.
8, and azimuth Antenna Drive TG-113/TPN-8. Ensure
(2) Front and rear covers removed from
that Radar Set AN/TPN-18 has been adjusted and
Radar Receiver-Transmitter RT-818/TPN-18.
aligned after repairs before performing tests in this
section. Refer to paragraphs 3-15 through 3-46 for
adjustments and alignment instructions.
4-1
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