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The 1B or 2B pump will not come on automatically (“AUTO”mode selected and flap less than zero degrees), in support of a primary pump failure on the ground.
GF1310_011
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
HYDRAULIC CONTROL PANEL (1B/2B SWITCHES) (CONT'D)
Flight Operation
The normal pump switch configuration for in flight hydraulic systems 1 and 2 operation is “AUTO” mode of operation.
The 1B or 2B pump will come on automatically (“AUTO”mode selected) in support of the applicable primary pump failure in flight. When an ACMP is commanded on due to a low pressure condition of the primary pump, that ACMP will remain on for a minimum of 5 minutes (including touchdown) unless “ON”or “OFF”is selected. This is required to prevent ACMP overheating due to continuous restarts if the low pressure alternates above and below 1800 psi.
During single VFG operation, ACMPs 1B and 2B are load shed since their respective busses are disconnected from the remaining good generator.
Volume 2 Flight Crew Operating Manual Rev 2A, Apr 11, 2005
HYDRAULIC SYSTEM 1 SCHEMATIC
Rev 8, Jan 05, 2006 Flight Crew Operating Manual Volume 2
HYDRAULIC SYSTEM 2 SCHEMATIC
GF1310_013a
Volume 2 Flight Crew Operating Manual Rev 8, Jan 05, 2006
HYDRAULIC SYSTEM 3
System 3 includes a reservoir, ACMPs 3A and 3B, RAT pump, manifold with pressure, return and case drain filters, hydraulic shutoff valve, heat exchanger and ground servicing panel. Hydraulic overfill bottles for the system are provided and located near system 3 components.
Reservoir
DIRECT READING GAUGE
SYSTEM 3 RESERVOIR
GF1310_014
System 3 reservoir is located in the lower belly fairing. Fluid quantity and temperature transducers are located on the reservoir and are indicated on the HYDRAULIC synoptic page.
ACMPs 3A and 3B
3A AND 3B PUMPS
MANIFOLD
GF1310_015
The system 3 ACMPs are located in the lower belly fairing. System 3A pump is used as the primary pump (runs continuously in the ON position) and 3B as the backup pump.
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual Volume 2
HYDRAULIC SYSTEM 3 (CONT'D)
Ram Air Turbine (RAT)
In case of an emergency (example: two-engine failure), the RAT is deployed and will power an independent hydraulic pump for system 3. Therefore system 3 has three hydraulic pumps available to power the system.
The RAT hydraulic pump is mounted at the rear of the RAT. It uses system 3 hydraulic fluid for emergency operations. The RAT operation is described in the ELECTRICAL Chapter 7 of this manual.
Heat Exchanger
SYSTEM 3 HEAT EXCHANGER
The heat exchanger is positioned in the left fuel feed tank. System 3 heat exchanger has the same function as systems 1 and 2.
Filter manifold
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