3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the rudder servocontrols with individual hydraulic system (Ref. AMM TASK 27-24-00-710-002).
4. Fault Isolation
_______________
A. On the lower ECAM display unit, on the F/CTL page:
(1) if the pointer of the RUD indicator does not go back to the neutral position:
- do the adjustment of the rudder actuating spring rod (Ref. AMM TASK 27-24-00-820-001).
(2) if the pointer of the RUD indicator does not move to the mark (left or right):
- make sure that there is no warning related to rudder travel limitation.
B. Do the test given in para. 3.
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May 01/05 CES
YAW DAMPER ACTUATION - FAULT ISOLATION PROCEDURES
_________________________________________________
TASK 27-26-00-810-801
Failure of the Yaw Damper System
1. Possible Causes
_______________
- FAC-1 (1CC1)
- SERVO ACTR-YAW DAMPER, 1 (3CC1)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R ESPM 205550 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 27-24-00-710-002 Operational Test of the Rudder Servocontrols with
Individual Hydraulic System 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 22-68/04 R
3. Fault Confirmation
__________________
A. Test not applicable, you cannot confirm this fault on the ground.
4. Fault Isolation
_______________
A. If the fault symptom is identified by the crew observation F/CTL - Yaw and roll jerk very hard:
(1) Remove the FAC related to the system which was active at the time of the event (Ref. AMM TASK 22-66-34-000-002).
NOTE : In normal configuration, the FAC-1 (1CC1) servoes the Green
____
yaw damper servo actuator (3CC1).
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Nov 01/04 CES
(2) At the FAC receptacle, do a check of the resistance and insulation of the LVDT of SERVO ACTR-YAW DAMPER, 1 (3CC1)(COM) between pins AB/2E and AB/2F, and between pins AB/3E and AB/3F (Ref. ASM 22-68/04).
NOTE : The resistance of the two secondary windings must be between
____ 30 Ohms and 500 Ohms. The insulation must be more than 100 Megohms.
(a) If the check is correct: 1 Replace the FAC-1 (1CC1) (Ref. AMM TASK 22-66-34-000-002) and
_ (Ref. AMM TASK 22-66-34-400-002).
2 Do a check of the wiring between the LVDT and the FAC (Ref.
_ ASM 22-68/04) for correct connections.
3 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).
4 Do the Operational test of the rudder servocontrols with
_ individual hydraulic system (Ref. AMM TASK 27-24-00-710-002).
(b) If the check is not correct: 1 Clean the connector A of the SERVO ACTR-YAW DAMPER, 1 (3CC1)
_ R (Ref. ESPM 205550).
2 At the FAC receptacle, do again a check of the resistance and
_
insulation of the LVDT.
a If the check is correct, no further maintenance action is
_
necessary.
NOTE : After the subsequent flight, if the fault continues,
____ 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).
b If the check is not correct, see Para. (3).
_
(3) At the yaw damper, do a check of the resistance and insulation between pins A/C and A/B, and between pins A/K and A/J (Ref. ASM 22-68/04).
(a) If the check is not correct, 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)
(b) If the check is correct, repair the wiring (Ref. ASM 22-68/04).
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