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 96 TOC ]
96-05-10
Page 201
Revision 8
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.
HEAVY DUTY BATTERY (17 AMP, 20 CELL)
MAINTENANCE PRACTICES
1. Description and Operation
(Ref. Figure 201) The 17 ampere hour (amp
hr), 20 cell nickel cadmium (ni-cad) battery is
a rechargeable, nominal 24 volt, 20 cell battery
capable of starting the engine at temperatures
ranging from -25
°
to +140
°
F (-22
°
to +60
°
C).
The 20 identical and individually-replaceable
cells are contained in separate molded cases
and are interconnected by bus bars. Each cell
has a removable vented cap, and is notched
internally to aid in checking cell electrolyte
level. Temperature sensors attached to the
cells monitor battery temperature and activate
the helicopter caution and warning indicator
system should battery overheating occur
during helicopter operation. The cells are
arranged in a battery box with a vented,
removable top, which is attached to the box by
four clamps. The connector for the battery wire
harness is on the exterior of the box. Mounting
brackets are attached to each end of the
battery box. The mounting brackets mate with
support assemblies installed in the battery
compartment and are attached to the support
assemblies with four screws.
2. Battery Handling and Servicing
Precautions
Electrolyte used in nickel-
cadmium batteries contains
potassium hydroxide, a caustic chemi­
cal agent. Serious burns result if elec­
trolyte contacts skin. Explosive gases
may be released from battery during
charging. Before removing battery
from helicopter, make sure that power
selector switch is at OFF position. Re­
moval or installation of battery con­
nector while battery is under load may
result in explosion, electrical arcing or
possible severe burns. When charging
battery, comply with procedures per
Battery Charging.
3. Troubleshooting
Refer to the manufacturer's instructions (Ref.
Sec. 01-00-00) for troubleshooting informa­
tion.
4. Battery Servicing
Service the 17 amp hr battery as described in
Section 96-05-00.
5. Battery Charging
For battery charging procedures and require­
ments, refer to Section 96-05-00 and the
battery manufacturer's instructions (Ref. Sec.
01-00-00).
6. Cleaning, Repair and Maintenance
Clean, inspect and maintain the battery,
including the box, individual cells, bus bars
and attaching hardware, according to the
manufacturer's instructions (Ref. Sec.
01-00-00). Refer to Figure 201 for cell
arrangement and busing.
7. Battery Temperature Sensors
The temperature sensors used with the 17
amp hr battery are identical to those used with
the 13 amp hr battery. Refer to Section
96-05-00 for maintenance and operational
check procedures for the battery temperature
sensors.
WARNING