SECTION II EQUIPMENT DESCRIPTION AND DATA

TM 55-4920-430-13

1-7. Notes, Cautions and Warnings.

Warnings, cautions, and notes emphasize important and critical instructions. They are defined as

follows:

An operating procedure or practice which, if not correctly followed, will

result in personnel injury or loss of life.

An operating procedure or practice which, if not strictly observed, will

result in damage or destruction of equipment.

NOTE

An operating procedure or condition which it is essential to highlight.

SECTION II EQUIPMENT DESCRIPTION AND DATA

1-8. Test Set Description. (See fig. 1-1.) The test set is used to test the AFCS panel, AFCS computers,

and cockpit control driver actuators (CCDA) of the advanced flight control system of the CH-47D heli-

copter. The test set includes a large number of independent test circuits that share a common AC/DC

voltmeter display and internal power supplies. The test set provides drive voltages to operate external

valves and actuators and excitation voltages for external position transducers and sensors. Signals are

developed to simulate position and feedback signals from position transducers. Test set circuits are

functionally divided into 12 distinct sections. The groupings are indicated in the organization of con-

trols and indicators on the test set panel. The control and indicators in each of these groups are listed

1-9. Test Set Capabilities.

The test set provides the control functions to test AFCS panel 145VS110-3, AFCS computer 145VS100-

3, longitudinal (pitch) cockpit control driver actuators (CCDA) 145C6100-1, and collective thrust

(CCDA) 145C6100-2.

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