SECTION II MAINTENANCE

TM 55-4920-430-13

SECTION II MAINTENANCE

4-26. General.

This section covers AFCS bench test set Aviation Intermediate Maintenance (AVIM) repair. Repair is

limited to component replacement. Tools and test equipment are listed in para 4-4. A list of consuma-

bles is included in table 4-1.

4-27. Inspection.

Visually check the panel components and cable assemblies as follows:

a. Check all electrical connectors and receptacles for bent or broken pins.

b. Check wires for frayed or worn insulation.

c. Check soldered connections for corrosion or poor mechanical connection.

d. Check rotary switches for proper alignment of switch position, and panel marking.

e. Operate the controls. Observe that the mechanical action of knobs and switches is smooth, and

free from internal and external binding. There shall be no excessive looseness. .

f. Check the lens cover of the AC/DC VOLTMETER for cracks, scratches, and looseness.

g. Check indicator lamps for damaged lenses.

4-28. Operational Check.

a. Perform the connection procedures in chapter 2.

b. Perform the startup procedures in chapter 2.

c. Perform the self-test and built-in-test procedures in chapter 2.

4-29. Removal of Panel (CRC).

a. Press the air valve to equalize inside and outside air pressures. (See fig. 4-1.)

b. Unlatch and remove cover.

c. Remove 18 screws from the panel.

The panel weighs about 55 pounds. Be careful when lifting the panel to

avoid personal injury.

d. Remove the panel from the case.

4-4