MD Helicopters 369-500, Maintenance Instructions Manual

Page: 642 / 722

CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
[ Main Menu ]
[ HMI − 3 Book TOC ]
[ Chapter 97 TOC ]
Page 202
Revision 12
97-02-00
The information disclosed herein is proprietary to MD Helicopters, Inc.
Neither this document nor any part hereof may be reproduced or transferred to
other documents or used or disclosed to others for manufacturing or any other
purpose except as specifically authorized in writing by MD Helicopters, Inc.
Copyright
©
1999 − 2016 by MD Helicopters, Inc.
(7). Set HOT MIKE switch to ON position.
Do not press rocker switch (or toggle
switch). Speak into microphone; audio
should be heard in all headsets.
(8). Set HOT MIKE switch to OFF position.
(9). With transmitter select switch still in
position 1, press pilot's (or copilot's)
rocker switch (or observer's toggle
switch) to RADIO position. This action
keys the optional avionic equipment
associated with position 1. Speak into
microphone; sidetone should be heard
at a level reduced from that of an
intercom signal. Release rocker (or
toggle) switch. The avionic equipment
should automatically be monitored, as
evidenced by signals or noise.
(10). Repeat above step with transmitter
select switch in positions 2 thru 5
(various avionic equipment selected for
transmission). Results should be the
same.
(11). Rotate transmitter select switch back to
ICS position.
(12). Set each receiver select switch to ON,
then OFF. Radio signals or noise should
be heard only when a switch is ON.
(13). Open ICS circuit breakers (pull out).
3. Intercommunication System Inspection
(Ref. Table 201)
Table 201. Intercommunication System Inspection Procedures
Items/Components Inspect For
Housings, enclosures Scratches, dents, corrosion,rust, bare spots on painted surfaces, loose or
damaged fasteners, missing attached parts, illegible markings.
Control panels Rust, corrosion, illegible markings, loose or missing knobs and dials, broken
indicator windows, sticking or inoperative controls, loose or missing attaching
parts, burned out lamps.
Fixed connectors Loose or missing attaching parts, bent or broken pins, loose or distorted
sockets, cracked or damaged shell.
Cable connectors Bent or broken pins, loose or distorted sockets, cracked or damaged case.
Wiring harnesses Evidence of overheating, damaged insulation, worn or frayed insulation, loose
terminal lugs or splices, missing identification labels.
Mounting brackets Physical damage, rust or corrosion, loose or missing attaching parts, loose or
missing structure rivets.
A. Intercommunication System Cleaning
Consumable Materials
(Ref. Section 91 − 00 − 00)
Item Nomenclature
CM234 Solvent, dry-cleaning
(1). Remove moisture and loose dirt with a
clean, lint-free cloth.
Cleaning solvent is toxic
and flammable. Do not in­
hale fumes. Use in a well-ventilated
area away from open flame. Avoid con­
tact with skin. Wash off thoroughly if
solvent does contact skin.
(2). Remove grease, fungus, and ground-in
dirt with a clean cloth dampened (not
wet) with cleaning solvent (CM234, or
equivalent).
WARNING