ICA-D212-725 (12)
Page 14 of 24
CHAPTER 12 – SERVICING (12-00-00)
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
reservoirs and drain the hydraulic fluid in a
suitable container.
12.17A.8.3 Connect the hose to the suction outlet
fitting of the hydraulic system No. 1 and No. 2
reservoirs. Tighten the hose.
12.17A.8.4 Fill the hydraulic system No. 1 and
No. 2 reservoirs with hydraulic fluid (C-072) up to
the correct level.
NOTE
If the hydraulic cart does not have dual system
hoses, do the following on the hydraulic system
No. 1 and then repeat the procedure on the
hydraulic system No. 2.
12.17A.8.5 Connect the hydraulic cart to the
hydraulic test couplings of the hydraulic system
No. 1 and No. 2 under the left sliding door of the
helicopter.
12.17A.8.6 Disconnect the return hoses from the
hydraulic cart and route them into an appropriate
container to collect the discarded hydraulic fluid.
12.17A.8.7 Turn electrical power on or apply
external power to the helicopter.
NOTE
To avoid wasting fluid, perform all steps below in
tight sequence without leaving the system
pressurized unnecessarily. If stops are required to
prepare the next step, turn the hydraulic cart off.
12.17A.8.9 Turn the hydraulic cart on and apply
1000 PSI (6895 kPa) of pressure with a flow of 3
gal/min (11 L/min) only to the hydraulic system No.
1. The hydraulic system No. 2 must stay
unpressurized.
12.17A.8.10 Move the collective stick, cyclic stick,
and pedals to operate all the flight control
actuators through full travel for a minimum of five
cycles.
12.17A.8.11 Operate the HYDR SYS No. 1 and
HYDR SYS No. 2 switches between the On and
OFF positions five times in approximately 2-second
intervals.
12.17A.8.11 Let the hydraulic cart run for 1 minute.
12.17A.8.12 Turn the hydraulic cart off.
12.17A.8.13 Turn the hydraulic cart on and apply
1000 PSI (6895 kPa) of pressure with a flow of 3
gal/min (11 L/min) only to the hydraulic system No.
2. The hydraulic system No. 1 must stay
unpressurized.
12.17A.8.14 Move the collective stick, cyclic stick,
and the pedals to operate all the flight control
actuators through full travel for a minimum of five
cycles.
12.17A.8.15 Operate the HYDR SYS No. 1 and
HYDR SYS No. 2 switches between the On and
OFF positions five times in approximately 2-second
intervals.
12.17A.8.16 Let the hydraulic cart run for 1 minute.
12.17A.8.17 Turn the hydraulic cart off.
12.17A.8.18 Connect the return hoses to the
hydraulic cart.
12.17A.8.19 Turn the hydraulic cart on and apply
1000 PSI (6895 kPa) of pressure with a flow of 5
gal/min (19 L/min) to both hydraulic systems.
12.17A.8.20 Let the hydraulic cart run for 5 minutes.
12.17A.8.21 Turn the hydraulic cart off.
12.17A.8.22 Turn the electrical power off or
disconnect external power from the helicopter.
12.17A.8.23 If required, add hydraulic fluid (C-072)
in the reservoirs of the hydraulic system No. 1 and
No. 2 up to the correct level.
12.17A.8.24 Replace the four hydraulic filter
assemblies (Chapter 29).
12.17A.8.25 Disconnect the hydraulic cart from the
hydraulic test couplings of the hydraulic system No.
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