-
Monitoring of the ELAC and FMGC peripherals at the level of the ARINC buses and the hard-wired discretes of engagement of these peripherals
R **ON A/C 001-049, 051-099, 101-149, 201-299,
-Limitation in amplitude (+ or - 20 deg.) and in speed (40 deg./s in manual control and 30 deg./s in AP).
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Monitoring of Yaw Damper - Block Diagram
Figure 005
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1 1 Feb 01/98
1 1
1CES 1
R **ON A/C 151-199, 401-499,
-Limitation in amplitude (+ or - 25 deg.) and in speed (40 deg./s in manual control and 30 deg./s in AP). In clean configuration, speed is 15 deg./s limited in manual control and in AP.
**ON A/C 301-399,
-Limitation in amplitude (+ or - 20 deg.) and in speed (40 deg./s in manual control and 30 deg./s in AP). In clean configuration, speed is 15 deg./s limited in manual control and in AP.
**ON A/C ALL
-
Monitoring of the computation through duplication and vote of the mid value of the deflection order among three values: . command deflection order . monitoring deflection order . null order (stability order). This ensures the passivation of any erratic value and its elimination from the vote. The voter circuit includes comparators: . C3 comparator between the deflection order generated by one channel and the value finally voted. This identifies the faulty channel. . C1 comparator between the command and the monitoring voter. This comparator monitors the digital section of the computer.
-
Monitoring of the power channel through comparison (C2) between the deflection order and the position feedback.
-In-flight monitoring of the pressurization status of the hydraulic systems.
-Monitoring of the transducers (Ref. 22-65-00).
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5. Test Procedure
______________
A. Computer At power rise, during the safety tests, the sections specific to the yaw damper and mainly the hard-wired engage logic, are validated.
B. Servo-Actuator This test is introduced to minimize the time of risk of hidden failures which can affect the standby channel. This test is used to check:
-
The electrical continuity of the current amplifier up to the servovalve by introduction of a non-executed fixed order (servo-actuator not validated)
-
The pressure switch between the electrovalves (capability to trigger) (which can be tested only with the hydraulic pressure applied).
R **ON A/C 106-149, 301-399, 401-499,
The pressure switch can be tested only with the hydraulic pressure coming from the engine.
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YAW DAMPER COMPUTATION - ADJUSTMENT/TEST
________________________________________
TASK 22-63-00-710-001
Operational Test of the Yaw Damper Function
WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______
YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______
CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
1. Reason for the Job
__________________
Make sure that the Yaw Damper System N.1 (N.2) operates correctly.
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 29-10-00-863-003 Pressurize the Blue Hydraulic System 29-10-00-864-003 Depressurize the Blue Hydraulic System 29-23-00-863-001 Pressurize the Green Hydraulic System from the Yellow
Hydraulic System through the PTU with the Electric Pump 29-23-00-864-001 Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU 31-32-00-860-010 Procedure to Get Access to the SYSTEM REPORT/TEST NAV
Page
31-60-00-860-001 EIS Start Procedure
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