- wiring of the YAW V1 COM and YAW V2 COM discretes (from the yaw damper servo-actuator,2 (3CC2) to the FAC 2 (1CC2))
- servovalve of the SERVO ACTR-YAW DAMPER, 2 (3CC2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-63-00-710-001 Operational Test of the Yaw Damper Function AMM 22-66-34-000-002 Removal of the FAC (1CC1,1CC2) AMM 22-66-34-400-002 Installation of the FAC (1CC1,1CC2) AMM 22-96-00-710-001 Operational Test of the AFS AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power AMM 27-26-51-000-001 Removal of the Yaw Damper Servo Actuator (3CC1) and
(3CC2) AMM 27-26-51-000-002 Removal of the Servovalve AMM 27-26-51-000-003 Removal of the Solenoid Valve AMM 27-26-51-000-004 Removal of the Pressure Switch AMM 27-26-51-400-001 Installation of the Yaw Damper Servo Actuator (3CC1)
and (3CC2) AMM 27-26-51-400-002 Installation of the Servovalve AMM 27-26-51-400-003 Installation of the Solenoid Valve AMM 27-26-51-400-004 Installation of the Pressure Switch AMM 29-10-00-863-003 Pressurize the Blue Hydraulic System with a Ground
Power Supply
AMM 29-23-00-863-001 Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
AMM 29-24-00-863-001 Pressurize the Yellow Hydraulic System with the
Electric Pump
ASM 22-68/04
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3. Fault Confirmation
__________________
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.
A. Job Set-Up
(1) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(b) Pressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-863-001), (Ref. AMM TASK 29-24-00-863-001) and (Ref. AMM TASK 29-10-00-863-003).
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU AUTO FLT/FAC2/28VDC 5CC2 M19 121VU AUTO FLT/FAC2/26VAC 14CC2 M18
C. Test
(1) Open the circuit breaker 5CC2.
(2) After a minimum of 10 seconds, close the circuit breaker 5CC2.
(3) After 2 minutes, do the operational test of the AFS (Ref. AMM TASK 22-96-00-710-001) and read the result for the FAC 2.
4. Fault Isolation
_______________
R
A. If the test gives the maintenance message AFS: FAC2/YD ACTR2 3CC2: R R - open the circuit breakers 5CC2 and 14CC2, R - remove the FAC-2 (1CC2) (Ref. AMM TASK 22-66-34-000-002) and disconnect R the plug at the YAW DAMPER Servo-Actuator 2, R - do a check of the wiring between respectively:
R . The pins AF/4 and AF/6 of the FAC2 and the pins A/E and A/D of the
R YAW DAMPER Servo-Actuator,2,
R . The pins AC/4 and AC/6 of the FAC2 and the pins B/A and B/B of the
R YAW DAMPER Servo-Actuator,2.
R (Ref. ASM 22-68/04)
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R (1) If the wiring is not correct:
R - repair it.
R (2) If the wiring is correct:
R - connect the above mentioned plug,
R - do a check of the impedance between respectively:
R . the pin AC/4 and the pin AC/6,
R . then the pin AF/4 and the pin AF/6 of the FAC-2 rack connector.
R NOTE : The impedance must be more than 40 Ohms.
____
R (a) If the impedance is correct:
R - replace the FAC-2 (1CC2) (Ref. AMM TASK 22-66-34-400-002).
R (b) If the impedance is not correct:
R - replace the solenoid valve 1 or 2 of the SERVO ACTR-YAW DAMPER,
R 2 (3CC2) (Ref. AMM TASK 27-26-51-000-003) and (Ref. AMM TASK
R 27-26-51-400-003),
R - install the above removed FAC-2 (1CC2) (Ref. AMM TASK 22-66-34-
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本文链接地址：A320 Trouble Shooting Manual 排故手册 AUTO FLIGHT 自动飞行1(107)
