MD Helicopters 369-500, Инструкция по техническому обслуживанию

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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[ Chapter 95 TOC ]
95-00-00
Page 805
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.
Comply with all fuel safety
precautions when working
in or around fuel cells. If replacement
fuel quantity sending unit is not avail­
able for immediate installation, do not
remove installed unit.
(1). Remove fuel quantity sending unit (Ref.
Sec. 28-00-00).
(2). Using rosin core solder (CM815), solder
six-inch length of wire (CM813) to each
terminal of RC07GF511J resistor;
shrink sleeve (CM614) over resistor.
(3). Remove strain relief and detach
backshell from connector on sending
unit wiring harness (Ref. Figure 804).
(4). Cut wiring harness vinyl sleeve near
sending unit; pass one lead and resistor
through cut in vinyl sleeve until lead
can be mated with connector.
(5). Drill 0.146-0.152 inch (3.7084-3.8608
mm) diameter hole in base at approxi­
mate position shown; deburr hole and
remove all drill cuttings.
(6). Pass resistor lead nearest base through
hole; solder lead to bracket, using acid
core solder (CM816).
Ensure that all areas covered by
and in contact with acid core sol­
der are thoroughly flushed, to neutralize
acid (next step).
(7). Clean connection thoroughly by
flushing with distilled water containing
sodium bicarbonate.
(8). Using rosin core solder, attach opposite
lead of resistor to pin D of sending unit
wiring harness connector, using
existing red wire.
(9). Reassemble wiring harness connector.
NOTE:
If RTV type sealant was originally
used, RTV730 sealant (CM428) may be used
as an alternate to PR1221 sealing com­
pound.
(10). Seal around installed wire on both sides
of base, and on interface of bare wire to
insulation, using sealing compound.
(11). Allow sealing compound to cure for two
hours prior to installing sending unit in
helicopter.
(12). Remove temporarily installed sending
unit, if applicable, and reinstall
modified sending unit in helicopter (Ref.
Sec. 28-00-00).
(13). Turn on electrical power and check fuel
quantity indicator for correct reading
with a known quantity of fuel.
(14). Perform operational check of FUEL
LOW caution light (Ref. Caution/Warn­
ing System Operational Check) with a
fuel quantity greater than low level
warning limit, to ensure that FUEL
LOW
caution light does not glow under
this condition.
C. Weight and Balance Data
Helicopter weight and balance are not affected
by this modification.
4. Wiring Modification (369DS/N 0003 −
0162)
(1). Check that all electrical power is off.
(2). Remove instrument panel hood and
side fairings.
(3). Remove circuit breaker panel from
instrument console (Ref. Sec.
96-30-00).
(4). Disconnect electrical wiring harness
connector from EPO warning control
unit plug P19.
(5). Disconnect existing transmission
warning light circuit wire No. E518A22
from pin K of P19 wiring harness
connector plug (Ref. Figure 805).
(6). Connect wire No. E518A22 to PANEL
LT circuit breaker CB104-2, using
terminal lug MS25036-149.
NOTE:
The next step is applicable to helicop­
ters serial nos. 0003D thru 0129D only.
(7). Remove existing UTIL LT circuit wire
No. L531A22 from ENG OUT circuit
breaker CB106-2 on panel; connect
wire No. L531A22 to NR GOV circuit
breaker CB103-2 on panel.
WARNING
CAUTION