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FCOM 19 AUG 10
FILTERS
Applicable to: ,
L3 The hydraulic fluid is maintained clean by filters:
‐ Two HP filters on green system
‐ One HP filter on blue system and one on yellow system
‐ One on the reservoir filling system
‐ One on the braking system
‐ One return line filter on each system (LP filters)
‐ One case drain filter on engine pump permits the monitoring of wear by detection of metallic
particles in the filters.
HYDRAULIC SYSTEM MONITORING UNIT (HSMU)
Applicable to:
The HSMU monitors the hydraulic system.
It processes :
‐ Control and monitoring of electric pumps
‐ RAT extension
‐ ENG 1 and ENG 4 fire shutoff valve closure in case of green reservoir low level
‐ Hydraulic quantity indication correction for fluid temperature
‐ Reservoir overheat warning
‐ FAULT light illumination logic
‐ LEAK MEASUREMENT VALVE control (closure inhibited in flight, closure of yellow valve during
cargo door operation).
HYDRAULIC SYSTEM MONITORING UNIT (HSMU)
Applicable to: ,
The HSMU monitors the hydraulic system.
It processes :
‐ Control of electric pumps
‐ RAT extension
‐ Both engine green hydraulic fire shutoff valve closure in case of green reservoir low level
‐ Hydraulic quantity indication correction for fluid temperature
‐ Reservoir overheat warning
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - GENERATION
A330/A340 FLEET DSC-29-10-20 P 7/12
FCOM 19 AUG 10
‐ FAULT light illumination logic
‐ LEAK MEASUREMENT VALVE control (closure inhibited in flight, closure of yellow valve during
cargo door operation).
HYDRAULIC GENERATION
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - GENERATION
A330/A340 FLEET DSC-29-10-20 P 8/12
FCOM 19 AUG 10
HYDRAULIC GENERATION
Applicable to: ,
RESERVOIR PRESSURIZATION
Applicable to:
Normally, HP bleed air from engine 2 pressurizes the hydraulic reservoirs automatically. If the bleed
air pressure is too low, the system takes bleed air pressure from the crossbleed duct.
The system maintains a high enough pressure to prevent their pumps from cavitating.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - GENERATION
A330/A340 FLEET DSC-29-10-20 P 9/12
FCOM 19 AUG 10
RESERVOIR PRESSURIZATION
Applicable to: ,
Normally, HP bleed air from engine 1 pressurizes the hydraulic reservoirs automatically. If the bleed
air pressure is too low, the system takes bleed air pressure from the crossbleed duct.
The system maintains a high enough pressure to prevent their pumps from cavitating.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - GENERATION
A330/A340 FLEET DSC-29-10-20 P 10/12
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - GENERATION
A330/A340 FLEET DSC-29-10-20 P 11/12
FCOM 19 AUG 10
INDICATIONS
Applicable to: ALL
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - GENERATION
A330/A340 FLEET DSC-29-10-20 P 12/12
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - DISTRIBUTION
A330/A340 FLEET DSC-29-10-30 P 1/6
FCOM 19 AUG 10
DISTRIBUTION
Applicable to:
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - DISTRIBUTION
A330/A340 FLEET DSC-29-10-30 P 2/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - DISTRIBUTION
A330/A340 FLEET DSC-29-10-30 P 3/6
FCOM 19 AUG 10
DISTRIBUTION
Applicable to: ,
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - DISTRIBUTION
A330/A340 FLEET DSC-29-10-30 P 4/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
DESCRIPTION - DISTRIBUTION
A330/A340 FLEET DSC-29-10-30 P 5/6
FCOM 19 AUG 10
LEAK MEASUREMENT VALVES
Applicable to: ALL
Used only on ground.
Leak measurement valves are positioned upstream of the primary flight controls. They are used
for the leak measurement of each system and may only be closed on ground, by using the LEAK
MEASUREMENT VALVES pushbutton on the maintenance panel. The yellow valve is automatically
closed during cargo door operation.
　
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