ICA-D212-725 (29)
Page 13 of 50
CHAPTER 29 – HYDRAULIC SYSTEM (29-00-00)
COPYRIGHT
2007 BY DART AEROSPACE LTD.
THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
Table 29-2.
Troubleshooting (Cont.)
Indication of Trouble
Probable Cause
Corrective Action
FILTER INDICATORS TRIPPED
Filters clogged.
If indicator in cabin nose is red or
white, check both system filter
assemblies for tripped indicators.
Manually reset indicators and
operate system. Move controls
rapidly. If indicators again trip,
filters are clogged.
Clean filter elements as required.
Reset module indicators and
remote indicator.
Module indicators defective.
Module indicators trip with known
serviceable filter elements
installed, but remote indicators
remain green or black and do not
extend.
Replace or repair defective filter
modules.
Remote indicators defective.
Remote indicators trip (red or
white), but module indicators do
not trip.
Replace remote indicators. (It is
acceptable to return helicopter to
service provided the module
indicators are inspected daily
until remote indicators are
replaced).
EITHER HYDRAULIC SYSTEM OVERHEATS.
NOTE
System 2 operates at slightly higher temperature than system 1 due to difference in pump rpm.
Pump defective, allows
increasing pressure.
Use a test gage to check system
pressure, 1050 PSI (7240 kPa)
maximum.
Replace pump.
System relief valve held fully
open.
Check for loss of control
response, and for flow through
relief valve.
Replace valve and filter module.
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