R **ON A/C 106-149, 211-299, 301-399, 401-499,
1HA1 COMPUTER-BLEED AIR MONITORING 95VU 121 811 36-11-34 1HA2 COMPUTER-BLEED AIR MONITORING 96VU 122 811 36-11-34 7260HM VALVE-APU BLEED CHECK 150 36-12-51 3HV SELECTOR-X-BLEED 30VU 210 36-12-52 4HV RELAY-CROSSBLEED VALVE 96VU 122 811 36-12-52 5HV P/BSW-APU BLEED FAULT/ON 30VU 210 36-12-52 6HV VALVE-CROSSBLEED 192 192FB 36-12-52 7HV RELAY-CROSSBLEED VALVE INDICATION 95VU 121 811 36-12-52
59KD BOX-ELECTRONIC CONTROL 150 49-61-53 VALVE-APU BLEED CONTROL 310 315AL/ 49-51-51 316AR 8LP RELAY-APU BLEED P/BSW 70VU 126 822 36-12-00 7265HM BELLOW BULKHEAD 311 36-12-00
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
Post SB 21-1121 For A/C 001-049,051-060,101-102,
1HA1 COMPUTER-BLEED AIR MONITORING 95VU 121 811 36-11-34 1HA2 COMPUTER-BLEED AIR MONITORING 96VU 122 811 36-11-34 7260HM VALVE-APU BLEED CHECK 150 36-12-51 3HV SELECTOR-X-BLEED 30VU 210 36-12-52
R 4HV RELAY-CROSSBLEED VALVE 96VU 122 811 5HV P/BSW-APU BLEED FAULT/ON 30VU 210 36-12-52
-------------------------------------------------------------------------------FIN I FUNCTIONAL DESIGNATION I PANELIZONEIACCESS I ATA I I I I DOOR I REF. -------------------------------------------------------------------------------6HV VALVE-CROSSBLEED 192 192FB 36-12-52 R 7HV RELAY-CROSSBLEED VALVE INDICATION 95VU 121 811 59KD BOX-ELECTRONIC CONTROL 150 49-61-53 VALVE-APU BLEED LOAD 310 315AL/ 49-51-51 316AR 8LP RELAY-APU BLEED P/BSW 70VU 126 822 36-12-00 7265HM BELLOW BULKHEAD 311 36-12-00
**ON A/C ALL
3. System Description
__________________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
(Ref. Fig. 006)
**ON A/C 001-049, 051-060, 101-102,
(Ref. Fig. 007)
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
R Post SB 21-1121 For A/C 001-049,051-060,101-102,
R (Ref. Fig. 007B)
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
You can use the APU to supply bleed-air to the user systems, while on the ground and during flight. The APU can supply bleed-air during the climb of the aircraft from the ground to an altitude of 20,000 ft.(6096 m). The APU has a APU bleed load valve and a surge control valve. The APU supplies the bleed-air to the user systems when the APU bleed load valve is in the open position. The supply of the bleed-air is in accordance with demand of the user systems.
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APU Bleed Load Valve - Electrical Schematic
Figure 006
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APU Bleed Control Valve - Electrical Schematic
Figure 006A
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INTENTIONALLY BLANK
R 1 1
36-12-00Page 17
1 1 Aug 01/05 1 1 1CES 1
Crossbleed Valve - Electrical Schematic
Figure 007 (SHEET 1)
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Crossbleed Valve - Electrical Schematic
Figure 007 (SHEET 2)
R 1EFF : 001-049, 051-060, 101-102, 1 36-12-00Page 19 1 1 Aug 01/05 1 1 1CES 1R Crossbleed Valve - Electrical Schematic R Figure 007A (SHEET 1)
R 1EFF : 106-149, 221-223, 225-299, 301-399, 1 36-12-00Page 20 1401-499, 1Aug 01/05 1 1 1CES 1R Crossbleed Valve - Electrical Schematic R Figure 007A (SHEET 2)
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Crossbleed Valve - Electrical Schematic R Figure 007B (SHEET 1)
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Crossbleed Valve - Electrical Schematic R Figure 007B (SHEET 2)
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The APU bleed-air pressure has a set tolerance independant of the bleed-air flow. The pressure of the APU bleed-air is kept in its set tolerance by the surge control valve. The APU Electronic Control Box (ECB) 59KD receives the signals of the bleed-air demand.The ECB 59KD monitors the bleed-air supply and also controls the APU bleed load valve and the surge control valve. The APU bleed-air duct connects the APU to the crossbleed duct. A check valve installed in the APU bleed-air duct protects the APU when a different source supplies bleed air with a higher pressure. The crossbleed duct is in the unpressurized area and connects the left and right bleed-air systems. The crossbleed duct has a crossbleed valve which controls the bleed-air supply to the left and right bleed-air systems. When the engine Pressure Reducing Valves (PRV) close, the crossbleed valve opens automatically when the APU supplies the bleed-air. The crossbleed valve is an electrical shut-off valve controlled by the Bleed-Air Monitoring Computer (BMC) for the automatic operation. You can also operate it manually from the cockpit.
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