TM 55-4920-429-13
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CHAPTER 3
AVUM MAINTENANCE
SECTION I AVUM MAINTENANCE INSTRUCTIONS
General.
This chapter provides procedures for maintenance tasks authorized at Aviation Unit Maintenance
(AVUM) level. Except for the tasks covered in this chapter, no special maintenance instructions are re-
quired. Repair at this level is limited to lamp and lens replacement and cables replacement or repair.
3-2. Servicing.
a. There are no servicing requirements except for those tasks identified in the preventive
maintenance checks and service chart (para 3-9).
b. The following tools are required to perform AVUM maintenance on the test set.
(1) Tool kit electronic equipment TK-l01/G NSN 5180-00-064-5178.
(2) Crimping tool assembly NSN 5120-00-075-2544.
3-3. Cleaning.
a. Inspect the exterior of the equipment. The exterior surface shall be free of dust, dirt, grease, and
fungus. Remove dust and loose dirt with a clean soft cloth.
Dry cleaning solvent is combustible and toxic. It can irritate skin and
cause burns. Use only with adequate ventilation, away from open
flame. In case of contact, immediately flush skin or eyes with water for
at least 15 minutes. Get medical attention for eyes.
b. Remove grease, fungus, and ground-in dirt from the equipment using a cloth damp with solvent
(item 1, table 3-l).
c. Clean the front panel, multimeter glass, indicator lenses, and control knobs and switches. Use a
clean, soft cloth. If necessary, dampen the cloth (item 2, table 3-1) with water. Use mild soap (item 3, ta-
ble 3-1) for more effective cleaning.
3-4. Touch-Up Painting.
a. Case or Cover. Refer to the applicable cleaning and refinishing practices in TM 43-0139.
(1) Finish.
(a) Remove corrosion from case or cover by sanding with abrasive cloth (item 4, table 3-l).
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