Inspection Requirements. - SB-740-91-010233

SB 740-91-01

3. Inspection Requirements.

The following mechanical-visual inspections are applicable to all R-442/VRC series

systems, sets, units, and assemblies and further define the coded inspection cri-

teria given in appendix A.

(1) Inspect equipment covers and front panels for condition of

finish and panel markings.

(2) Inspect for dents, punctures, or warped areas.

(3) Inspect spring lock fasteners and receptacles.

(4) Inspect external surfaces for loose or missing screws or

washers.

(5) Inspect receptacles for condition of pins, contacts, mounting,

and for foreign particles.

(6) Inspect air filters and air outlet for excessive dirt or

grit.

(7) Operate all controls through all their positions. (Do not

disturb screwdriver adjustments.) Controls shall operate

smoothly with no binding. Control knobs shall be tight on

their shafts with no missing or loose hardware.

(8) Check for meter damage and broken indicator glass on radio set

control and reflectometer.

(9) Inspect all exposed metal surfaces for rust and corrosion.

(10) Inspect safety wiring on the wing nut fasteners on the

mounting.

(11) Check the mechanical action of the switches and knobs. They

shall move smoothly, free of binding and scraping on the radio

set control.

(12) Inspect handles for looseness and defects.

4. Electrical Tests.

The following tests are to be performed, using the applicable data sheet (figure

B-9), for Receiver, Radio R-442/VRC and R-442A/VRC.

B-45