3. Job Set-up
__________ Subtask 29-23-00-860-053
A. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Open the main doors of the main landing gear (Ref. TASK 32-12-00-010-001).
(3)
Make sure that the isolation coupling of the Power Transfer Unit (PTU) is connected.
(4)
Energize the electrical circuits (Ref. TASK 24-41-00-861-002).
(5)
Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).
(6)
On the ECAM control panel on the center pedestal, press the HYD pushbutton switch (P/BSW). Make sure that the HYD page is shown on the ECAM lower DU.
(7)
Make sure that the ECAM does not show any of these conditions:
-
Green or Yellow reservoir, low air pressure,
-
Green or Yellow reservoir, low fluid contents.
(8)
If necessary, pressurize the reservoir (Ref. TASK 29-14-00-614-002).
(9)
If necessary, add fluid to the reservoir (Ref. TASK 12-12-29-611-001).
(10)
On the panel 400VU make sure that the landing gear lever is in the DOWN position.
(11)
On the panel 40VU make sure that the PTU P/BSW is set to AUTO.
Subtask 29-23-00-865-050
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/HYD POWER/Y 3803GX N30 123VU Y HYD/ELEC/PUMP 3802GX AB06
R 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
4. Procedure
_________
(Ref. Fig. 201/TASK 29-23-00-991-001)
Subtask 29-23-00-863-052
A. Pressurization of the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
(1)
On the panel 40VU push the YELLOW ELEC PUMP P/BSW.
(2)
Make sure that the ECAM lower DU shows:
-the correct operation of the PTU,
-that the pressure of the Yellow hydraulic system is 3000 psi approximately,
-the pressure of the Green hydraulic system is 3000 psi approximately.
NOTE : The PTU pressurizes the system to a nominal pressure of 3000
____ psi, but if no consumers are operated the pressure is not constant. The PTU operates in a cycle which keeps the pressure in the Green hydraulic system between 2100 and 3150 psi.
ECAM Lower DU during Power Transfer
Figure 201/TASK 29-23-00-991-001
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TASK 29-23-00-863-002
Pressurize the Yellow Hydraulic System from the Green Hydraulic System through the PTU with the Ground Service Cart
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______ CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING : PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR
_______ THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.
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