Extended and Retracted Positions - Logic Diagram
Figure 012
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 36 1 1 Config-1 Aug 01/05 1 1 1CES 1
Extended and Retracted Positions - Logic Diagram
Figure 012A
R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 29-22-00Page 37 1301-399, 401-499, 1Config-1 Aug 01/05 1 1 1CES 1 **ON A/C ALL
A. Retracted Position
**ON A/C 001-049, 051-061, 101-105, 201-203,
(Ref. Fig. 013)
**ON A/C 001-049, 051-061, 101-105, 201-203,
Post SB 29-1111 For A/C 001-049,051-061,101-105,201-203,
(Ref. Fig. 013A)
**ON A/C 001-049, 051-061, 101-105, 201-203,
In the retracted position, the RAT is in the RAT compartment with the doors closed. The leg assembly is connected to the doors and keeps them closed. The internal lock in the RAT actuator locks the RAT in the retracted position. The index lock mechanism on the leg locks the turbine blades so that they can not turn. The turbine blades are at maximum coarse pitch. A calibrated flow of warm oil from the high-pressure bleed in the GCM is supplied to the leg assembly and the pump.
B. Not Applicable
R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
B. Retracted Position
In the retracted position, the RAT is kept in the RAT stow compartment with the doors closed. The leg assembly has two links which are attached to the stow compartment doors and keep them closed. The internal lock in the ejection jack locks the RAT in the retracted position. The index mechanism on the leg assembly locks the turbine blades so that they can not turn. The turbine blades are at the fine pitch. A calibrated flow of warm oil is supplied to the leg assembly and the pump.
R 1EFF : ALL 1 29-22-00Page 38 1 1 Config-1 Aug 01/05 1 1 1CES 1
RAT Retraction - Schematic
Figure 013
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 39 1 1 Config-1 May 01/05 1 1 1CES 1
RAT Retraction - Schematic
Figure 013A
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 40 1 1 Config-1 May 01/05 1 1 1CES 1 **ON A/C 001-049, 051-061, 101-105, 201-203,
Post SB 29-1111 For A/C 001-049,051-061,101-105,201-203,
In the retracted position, the RAT is in the RAT compartment with the doors closed. The leg assembly is connected to the doors and keeps them closed. The internal lock in the RAT actuator locks the RAT in the retracted position. The index lock mechanism on the leg locks the turbine blades so that they cannot turn. The turbine blades are at maximum coarse pitch.
B. Not Applicable
**ON A/C ALL
C. Extension
**ON A/C 001-049, 051-061, 101-105, 201-203,
(Ref. Fig. 014)
R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
(Ref. Fig. 014A)
**ON A/C 001-049, 051-061, 101-105, 201-203,
(Ref. Fig. 015) When the RAT gets a command to extend (from automtic or manual selection), one of the two solenoids operates and releases the retract lock. Spring pressure extends the actuator which extends the RAT into the airflow. The contacts of the stow limit switch close and send a signal to the ECAM system. The compartment doors open automtically as the RAT extends. The index lock mechanism disengages automatically when the RAT is 5 degrees from its fully extended position. The turbine can then start to turn.
RAT Extension Logic
Figure 014
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 42 1 1 Config-1 Aug 01/05 1 1 1CES 1
RAT Extension Logic
Figure 014A
R 1EFF : 062-099, 106-149, 151-199, 204-299, 1 29-22-00Page 43 1301-399, 401-499, 1Config-1 Aug 01/05 1 1 1CES 1
RAT Extended and Operational - Schematic
Figure 015
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-22-00Page 44 1 1 Config-1 Aug 01/05 1 1 1CES 1 The turbine blades are in coarse pitch immediately after the RAT is extended. As the turbine starts, fluid flows from the outlet of the high-pressure pump through the flow-sensitive valve of the GCM to the low-pressure system. Thus the turbine can get to its operating speed before the full load of the hydraulic pump is applied. The gerotor pump supplies servo pressure as the turbine speed increases and the blade pitch angle decreases. The flow from the RAT pump increases and closes the flow-sensitive by-pass valve. At the same time a flow-sensitive valve in the leg assembly operates and stops the warm oil bleed. 中國(guó)航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機(jī)維護(hù)手冊(cè) AMM HYDRAULIC POWER 液壓5(101)
