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-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA
| | | | DOOR | REF. -------------------------------------------------------------------------------6074CM TORQUE SHAFT ASSY-TRANSMISSION 621 621AT 27-50-00 6075CM STEADY BEARING ASSY-TRANSMISSION 622 622AB 27-84-44 6076CM TORQUE SHAFT ASSY-TRANSMISSION 622 622AB 27-50-00 6077CM ACTUATOR ASSY-TYPE B 622 622AB 27-84-49 6078CM TORQUE SHAFT ASSY-TRANSMISSION 622 622AB 27-50-00 6079CM ACTUATOR ASSY-TYPE B 622 622CB 27-84-49 6080CM TORQUE SHAFT ASSY-TRANSMISSION 622 622CB 27-50-00 6081CM STEADY BEARING ASSY-TRANSMISSION 622 622EB 27-84-44 6082CM TORQUE SHAFT ASSY-TRANSMISSION 622 622EB 27-50-00 6083CM ACTUATOR ASSY-TYPE B 622 622FB 27-84-49 6084CM TORQUE SHAFT ASSY-TRANSMISSION 622 621HB 27-50-00 6085CM ACTUATOR ASSY-TYPE B 622 622KB 27-84-49 6086CM TORQUE SHAFT ASSY-TRANSMISSION 622 622LB 27-50-00 6087CM ACTUATOR ASSY-TYPE B 622 622NB 27-84-49 6088CM TORQUE SHAFT ASSY-TRANSMISSION 622 622NB 27-50-00 6089CM ACTUATOR ASSY-TYPE B 622 622QB 27-84-49 6090CM TORQUE SHAFT ASSY-TRANSMISSION 622 622QB 27-50-00 6091CM ACTUATOR ASSY-TYPE B 622 622SB 27-84-49 6092CM TORQUE SHAFT ASSY-TRANSMISSION 622 622SB 27-50-00 6094CM TORQUE SHAFT ASSY-TRANSMISSION 622 622UB 27-50-00 6095CM ACTUATOR ASSY-TYPE B 622 622UB 27-84-49 6096CM TORQUE SHAFT ASSY-TRANSMISSION 622 622UB 27-84-45
3. System Description
__________________
(Ref. Fig. 003)
R A. Hydraulic Actuation
Two of the three hydraulic systems supply fluid pressure through a priority valve to the PCU:
-
the BLUE hydraulic system supplies valve block 25CV
-
the GREEN hydraulic system supplies valve block 26CV
-
the priority valves are set when the pressure drops below 140 bar (2030 psi).
Each valve block controls the flow of hydraulic fluid to the related hydraulic motor and its POB.
Each POB stops and holds the output shaft of the related hydraulic motor when:
-the solenoids of the related valve block are de-energized because of a normal PCU shutdown sequence
PCU Hydraulic System - Schematic Figure 003
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-there is not enough pressure in the related hydraulic system - one of the failures given in (Ref. 27-81-00) occurs.
A differential gearbox connects the output shafts of the hydraulic motors and transmits their torque to the power transmission system. If a POB engages and holds its motor, the remaining motor moves the transmission system at half speed but at full torque.
B. Power Transmission
(Ref. Fig. 001)
**ON A/C 001-049, 051-061, 101-105, 151-152, 201-204,
(Ref. Fig. 004)
R **ON A/C 062-099, 106-149, 153-199, 205-299, 301-399, 401-499,
(Ref. Fig. 004A)
**ON A/C ALL
(Ref. Fig. 005)
The slat transmission system includes:
-torque shafts in the fuselage and wings
-
a 19 degree bevel gearbox which changes the direction in which the drive is aligned
-
a T-gearbox which changes the direction in which the drive is aligned through 90 degrees. This gives an output to each wing
-two 63.5 degree bevel gearboxes at each wing root. These gearboxes move the drive from below wing level to the wing leading edge
-ten rotary actuators (two per slat) in each wing.
The torque shafts transmit power from the PCU to the gearboxes and actuators. Universal joints connect the torque shafts and steady bearings support them.
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