MD Helicopters 369-500, Maintenance Instructions Manual

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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[ Chapter 96 TOC ]
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Revision 11
96-48-00
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.
(3). Unsolder three wires from switch
terminals.
(4). Loosen NASl08lD04-2 setscrew from
369A4215 landing light switch knob,
and remove knob.
(5). Remove bushing nut and lockwasher
from switch, and remove switch from
plate.
(6). Remove one bushing nut, lockwasher,
and locking ring from new switch.
Discard locking ring.
(7). Tighten bottom bushing nut all the way
down, then install lockwasher.
(8). Insert bushing of switch through hole
in plate. Be sure to engage tab on plate
with keyway on switch bushing.
(9). Install lockwasher and nut on bushing,
and tighten.
(10). Clean ends of wires with naphtha
(CM220) and air dry thoroughly.
(11). Slip new sleeving (CM601) over ends of
wires.
(12). Using solder (CM815), attach wires to
switch as follows:
(a). Wire number L522D20 to switch
terminal 1.
(b). Wire number L123A20N to switch
terminal 2.
(c). Wire number L104C20 to switch
terminal 3.
(13). Slip sleeving (CM601) into position.
(14). Reinstall plate and switch assembly on
collective stick switch housing assembly
with four NAS600-3 screws and
AN936A4 washers.
(15). Reinstall 369A4215 landing light
switch knob, and tighten
NAS1081D04-2 setscrew.
(16). Perform Float Lamp Functional Test.
8. Float Lamp Circuit Breaker Switch
Replacement
(Ref. Figure 201) The FLT LDG LT circuit
breaker switch (CB140) may be located in the
lower left or lower right corner of the instru­
ment panel. Installation in the lower left
corner requires use of Collins RCR650 radio
receiver forward bracket, 369D24216, and
plate 369D292032-9. For installation of CB140
in the lower right corner, only plate
369D292032-5 is required.To remove CB140,
proceed as follows:
(1). Set master switch (S2) to OFF.
(2). Remove two terminal screws
(MS35206-241) and lockwashers
(MS35338-42), and remove two wires.
(3). Remove bushing nut (MS25062B8) and
lockwasher (AN936A716S).
(4). Draw CB140 rearward from instrument
panel.
(5). Install FLT LDG LT circuit breaker
switch (CB140) as follows:
(a). Remove bushing nut (MS25062B8)
and lockwasher (AN936A716S) from
CB140.
(b). Insert bushing of CB140 through
hole in panel so positioning key
engages small hole in panel above
bushing hole.
(c). Reinstall and tighten lockwasher and
nut.
(d). Remove two terminal screws
(MS35260-241) and lockwashers
(MS35338-42).
(e). Attach wire L522H10 to terminal 1
with fasteners removed.
(f). Attach wire L522A10 to terminal 2
with fasteners removed.
(g). Tighten all fasteners.
(6). Perform Float Lamp Functional Test.
9. Float Lamp Functional Test
Perform the following tests after installation
or maintenance of the float lamp assembly.
(1). Set master switch (S2) to ON.