-
the Power Transfer Unit (PTU) of the Green/Yellow system,
-
the electric and hand pumps of the Yellow system.
R Line Routing of Forward Part
R Figure 008A
R 1EFF : 401-499, 1 29-00-00 Page 23
1 1 Aug 01/05
1 1
1CES 1
INTENTIONALLY BLANK
1 1
29-00-00Page 24
1 1 Aug 01/05R 1 1
1CES 1
Line Routing of Center Part
Figure 009
R 1EFF : ALL 1 29-00-00Page 25/26 1 1 Aug 01/05 1 1 1CES
1
Line Routing of Aft Part Figure 010
1EFF : 1 1R 1CES ALL 1 11 1 29-00-00 Page 27 Aug 01/05
NOTE : The Blue Electric pump can be used as a auxiliary power unit for
____ maintenance purposes when the aircraft is on the ground.
The RAT of the Blue system is in a compartment in the left belly fairing, forward of the main landing-gear compartment. It extends into the airflow automatically when there is a total failure of AC busbars 1XP and 2XP. The crew can operate it from the flight compartment if necessary. The RAT supplies hydraulic power to the Blue system. If there is an electrical failure, the RAT also supplies the controlled speed motor generator (CSM/G) which gives electrical power to the aircraft.
The PTU of the Green/Yellow system is in the main landing gear compartment. It can operate in two directions, Green to Yellow, or Yellow to Green. There is no hydraulic connection between the two hydraulic systems. The PTU operates automatically when there is a difference in pressure between the two systems of 500 psi (35 bar). The PTU is permanently available, but can be set to off from the flight compartment if necessary. There is a quick-release self-sealing coupling which isolates the PTU to stop one system pressurizing the other during servicing.
The Yellow electric pump is in the Yellow hydraulic compartment. It supplies the Yellow main system with hydraulic power when necessary (failure of the engine or engine pump). It is set to on from the flight compartment. It also starts when the aircraft is on the ground and a selection is made to operate the cargo doors.
The hand pump of the Yellow system is on the Yellow ground service panel. It is used to operate the cargo doors if no electric power is available.
3. Power Supply
____________
**ON A/C 001-049, 051-061, 101-102, 201-202,
(Ref. Fig. 011)
R **ON A/C 062-099, 103-149, 151-199, 203-299, 301-399, 401-499,
(Ref. Fig. 011A)
**ON A/C ALL
The hydraulic system gets electrical power from the AC and DC systems of the aircraft.
Electrical Power Supply
Figure 011
R 1EFF : 001-049, 051-061, 101-102, 201-202, 1 29-00-00Page 29/30 1 1 Aug 01/05 1 1 1CES
1
Electrical Power Supply
Figure 011A
1EFF : 062-099, 103-149, 151-199, 203-299, 1 29-00-00Page 31/32 1301-399, 401-499, 1Aug 01/05 1 1 1CES These circuits have a 115 V AC supply:
-
the electric pump of the Yellow system,
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the electric pump of the Blue system.
These circuits have a 28 V DC supply:
-RAT,
-
the monitoring and control circuit of the Green system pump,
-
the monitoring and control circuit of the Yellow system (engine-driven) pump,
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the warning and control circuit of the Blue system,
-Eng 1 and Eng 2 fire valves,
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the low level indicator circuit of the reservoirs,
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the system pressure transmitters,
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the leak test solenoid valves,
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the PTU solenoid valves,
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the Yellow auxiliary system.
This circuit has a 26 V AC supply:
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