CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
96-30-00
Page 203
Revision 7
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.
strap (CM703) as required to secure
wire bundles. Ensure sufficient wire
slack to avoid stress on connections.
6. Load Chart
−
Electrical System
Electrical system load analysis data is
contained in Table 201 thru Table 207.
NOTE:
369D Helicopter S/N 003 - 723; 724 -
1149, 1151 - 1184; 1150, 1185 and subse
quent have major electrical system differ
ences. Complete wiring diagrams for each
electrical system and configuration are in
cluded in appropriate sections. Helicopter
serial numbers and configuration are used
to identify differences in this section.
7. Fault Isolation
For wiring diagram of power distribution
system, Ref. Figure 201, Figure 202,
Figure 203 and Figure 204 as applicable for
appropriate helicopter model. Use information
provided in Table 201, Sec. 96-00 for trouble
shooting the power distribution system.
8. Electrical System Switches, Controls and
Circuit Breaker Configurations
(Ref. Figure 205, Figure 206, Figure 207 and
Figure 208)
9. Circuit Breaker and Switch Panels
The circuit breaker and switch panels are
removable assemblies and includes provisions
for circuit breakers of the electrical system as
well as mounting holes for circuit breakers of
optional equipment. Circuit breakers, when
closed, are pressed (button in) for the applica
ble circuit. If a circuit is overloaded, the
corresponding circuit breaker opens (pops out),
de-energizing the circuit. Additional circuit
breakers and mounting holes are provided on
the panels. Markings for each switch circuit
breaker or other components indicate its
particular circuit function.
When necessary, replace circuit breakers in
accordance with FAA AC 43.13-1A (Ref. Table
201, 01-00-00) and aircraft standard electrical
repair and replacement practices and proce
dures.
10. Control Switches
Control switches, include circuit breaker type
switches, the key ON-OFF switch or
OFF-ACC-ON switch (ACC position of the
switch is used for manual starts), GEN-OFF
switch and the BATTERY-OFF-EXT PWR
(master) switch. Legends adjacent to switches
indicate control functions. The UTILITY PWR
and START PUMP switches are circuit
breaker type and snap to OFF in event of
circuit overload. The UTILITY PWR switch
controls electrical power to the utility recep
tacle.
Cyclic/collective stick grip configurations vary
and may have additional switches. Switch
functions are described in appropriate sec
tions. For replacement or repair of switches,
refer to Collective and Cyclic Stick Grips (Ref.
Sec. 67-10-20).
Ensure all electrical power is
OFF during removal and re
placement of circuit breakers, control
switches and edgelighted panels. Key
switch, when replacement is necessary, is to
be installed using only hardware specified
in step (2). below. Do not use nut and washer
supplied with replacement key switch.
11. Circuit Breaker and Switch Replacement
(1). Replace affected circuit breaker or
switch in accordance with FAA AC
43.13-1A (Ref. Table 201, 01-00-00),
aircraft standard electrical repair and
replacement practices and procedures
as follows.
(2). Remove and replace defective switch
assembly using new shakeproof washer
and AN type nut.
(3). Perform operational check of circuit
breaker or switch with associated
system or equipment.
12. Switch and Circuit Breaker Edgelighted
Panel Replacement
Replace panel with aircraft standard electrical
repair and replacement practices and proce
dures.
(1). Switch and Circuit breaker panel (left
and right). Remove right fairing (Ref.
CAUTION
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