High Pressure Bleed Valve - Schematic
Figure 010A
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(3) Controls and Indicating HP bleed valve operation is fully pneumatic. The lower ECAM display unit indicates its position (open or closed) on the BLEED page (Ref. Fig. 011) The two BMCs monitor the operation of the HP bleed valve (close microswitch signal, and transfer pressure level). They receive and process the signals and transmit the information per data bus by the System Data Acquisition Concentrator (SDAC) to the ECAM system which generates the system display (Ref. 36-20-00). (Ref. Fig. 012) Additionally, they transmit the information to the Centralized Fault Display Interface Unit (CFDIU). The CFDIU generates maintenance information which is displayed on the Multi Function Control Display Unit (MCDU) if the MCDU MENU is selected. (Ref. Fig. 013, 014, 015)
**ON A/C 001-049, 052-099, 101-105, 151-199, 201-228, 301-302,
(Ref. Fig. 016)
R **ON A/C 106-149, 229-299, 303-399, 401-499,
(Ref. Fig. 016A)
R **ON A/C 001-049, 052-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 017, 018, 019)
**ON A/C 051-051,
(3) Controls and Indicating HP bleed valve operation is fully pneumatic. The lower ECAM display unit indicates its position (open or closed) on the BLEED page (Ref. Fig. 011) The two BMCs monitor the operation of the HP bleed valve (close/open microswitch signals, and transfer pressure level). They receive and process the signals and transmit the information per data bus by the System Data Acquisition Concentrator (SDAC) to the ECAM system which generates the system display (Ref. 36-20-00). (Ref. Fig. 012)
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ECAM Upper and Lower Display Units Figure 011
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ECAM - Generation Figure 012
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CFDS Menu
Figure 013
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1
LAST LEG REPORT Page Figure 014
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PREVIOUS LEGS REPORT Page Figure 015
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LRU IDENT Page
Figure 016
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LRU IDENT Page Figure 016A
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CURRENT STATUS Page Figure 017
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CLASS 3 FAULTS Page Figure 018
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INTENTIONALLY BLANK
R 1 1
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TEST Page Figure 019 (SHEET 1)
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TEST Page Figure 019 (SHEET 2)
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Additionally, they transmit the information to the Centralized Fault Display Interface Unit (CFDIU). The CFDIU generates maintenance information which is displayed on the Multi Function Control Display Unit (MCDU) if the MCDU MENU is selected. (Ref. Fig. 013, 014, 015, 016, 017, 018, 019)
**ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
B. Bleed Pressure Regulator Valve (PRV)
**ON A/C 001-003, 052-054, 056-056,
(Ref. Fig. 020)
**ON A/C 004-049, 055-055, 057-099, 101-149, 201-299, 301-399,
(Ref. Fig. 020A)
**ON A/C 051-051,
(Ref. Fig. 020B)
**ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
(1) The PRV is a 4 in. dia. butterfly-type valve, normally spring-loaded closed in absence of upstream pressure. A minimum upstream pressure of 8 psig is necessary to open the valve. The PRV pneumatically regulates the downstream pressure to 44 plus or minus 1.75 psig. It closes automatically in the following cases : - overtemperature downstream of the precooler exchanger (257 plus or
minus 3) deg.C (60 s delay), - overpressure downstream of the PRV (57 plus or minus 3) psig (15 s delay),
-ambient overheat in pylon/wing/fuselage ducts surrounding areas,
-APU bleed valve not closed,
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