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) (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
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
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A. If the test gives the maintenance message AFS : FAC2/YD RVDT BOX 2CC:
- replace the FAC-2 (1CC2), (Ref. AMM TASK 22-66-34-000-002) and (Ref. AMM TASK 22-66-34-400-002).
(1) If the fault continues:
- do a check of the wiring of the 26VAC signal at RVDT box (2CC) from pin B/A to the first terminal block (Ref. ASM 22-68/04).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- do a check of the wiring of the ground signal at RVDT box (2CC) pin B/B (Ref. ASM 22-68/04).
1 If there is no continuity:
_
- repair the above wiring.
2 If there is continuity:
_
- replace the XDCR UNIT-YAW DAMPER POS (2CC), (Ref. AMM TASK 27-26-17-000-001) and (Ref. AMM TASK 27-26-17-400-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞22-63-00∞∞∞∞∞∞∞∞∞∞Page 217
Feb 01/03R CES
(2) If the fault continues:
- do a check and repair the wirings of the YAW V1 MON and YAW V2 MON discretes (from the RVDT box (2CC) to the FAC 2 (1CC2) (Ref. ASM 22-68/04).
B. Do the operational test of the yaw damper function (Ref. AMM TASK 22-63-00-710-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞22-63-00∞∞∞∞∞∞∞∞∞∞Page 218
Feb 01/03R
CES Loss of the Power Supply 26VAC of the Yaw Damper Side 1
1. Possible Causes
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- SERVO ACTR-YAW DAMPER, 1 (3CC1)
- wiring of the 26VAC signal at yaw-damper servo-actuator (3CC1)
- wiring of the ground signal at yaw-damper servo-actuator (3CC1)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 22-91-00-710-001 Ground Scanning of the AFS AMM 27-26-51-000-001 Removal of the Yaw Damper Servo Actuator (3CC1) and (3CC2) AMM 27-26-51-400-001 Installation of the Yaw Damper Servo Actuator (3CC1) and (3CC2) ASM 22-67/01
3. Fault Confirmation
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A. Test
(1) Do the Ground Scanning of the AFS (Ref. AMM TASK 22-91-00-710-001).
4. Fault Isolation
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A. If the test gives the maintenance message AFS : 431 XPA BUS BAR:
- replace the SERVO ACTR-YAW DAMPER, 1 (3CC1), (Ref. AMM TASK 27-26-51-000-001) and (Ref. AMM TASK 27-26-51-400-001).
(1) If the fault continues:
- do a check of the wiring of the 26VAC signal at yaw-damper servo-actuator (3CC1) from pin A/A to the first terminal block (Ref. ASM 22-67/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- do a check and repair the wiring of the ground signal at yaw-damper servo-actuator (3CC1) pin A/L (Ref. ASM 22-67/01).
B. Do the test given in Para. 3.
Feb 01/03R CES
Loss of the Power Supply 26VAC of the Yaw Damper Side 2
1. Possible Causes
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- SERVO ACTR-YAW DAMPER, 2 (3CC2)
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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(111)
