W DOC AIRBUS | TSM A320F

Loss of the Rudder Travel Limiting Function on the FAC 1

TASK 22-61-00-810-803-A
Loss of the Rudder Travel Limiting Function on the FAC 1

1. Possible Causes
  • Wiring for 28VDC signal (pin A2) and GND signal (pin X2) at the relay (13CC1)
  • Wiring of the RTL ACT VALID signal from the FAC1 to the RTLU and associated GND signal at the RTLU
  • RTL electronic module
  • LIMITATION UNIT-RUDDER TRAVEL [4CC]
  • Wiring of the RTL ACT PWR ON signal from the FAC1 to the relay 13CC1
  • RELAY-RTL SYS1 [13CC1]
  • Wiring of the 28VDC and GND at the RTLU (PWR SPLY)
  • FAC-1 [1CC1]
  • SW-LOW OIL PRESS [4000EN]
  • Wiring from the FAC 1 (1CC1) to the rudder travel limitation-unit (4CC)
  • SENSOR-TAT, 1 [11FP1]
  • Wiring of the RTL V1 and RTL V2 discretes from the FAC 1 (1CC1) to the rudder travel limitation-unit (4CC)
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 22-61-00-710-001
Operational Test of the Rudder Travel Limiting Function
AMM 22-66-34-000-002
Removal of the FAC
AMM 22-66-34-400-002
Installation of the FAC
ASM 226701
ASM 226802
AMM 22-96-00-710-001
Operational Test of the AFS
AMM 27-23-51-000-001
Removal of the Rudder Travel Limitation Unit
AMM 27-23-51-000-002
Removal of the Electronic Module of the Rudder Travel Limitation Unit
AMM 27-23-51-400-001
Installation of the Rudder Travel-Limitation Unit
AMM 27-23-51-400-002
Installation of the Electronic Module of the Rudder Travel Limitation Unit
AMM 34-11-18-000-001
Removal of the TAT Sensor
AMM 34-11-18-400-001
Installation of the TAT Sensor
AMM 79-34-15-000-040
Removal of the Low Oil Pressure Switch
AMM 79-34-15-000-041
Removal of the Low Oil Pressure Switch
AMM 79-34-15-400-040
Installation of the Low Oil Pressure Switch
AMM 79-34-15-400-041
Installation of the Low Oil Pressure Switch
3. Fault Confirmation
Subtask 22-61-00-865-050-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUAUTO FLT/FAC1/28VDC5CC1B04
Subtask 22-61-00-710-054-A
B. Test
   (1) Open the circuit breaker 5CC1.
   (2) After a minimum of 10 seconds, close the circuit breaker 5CC1.
   (3) After 2 minutes, do the operational test of the AFS AMM 22-96-00-710-001 and read the result for the FAC 1.
4. Fault Isolation
Subtask 22-61-00-810-052-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message AFS : FAC1/RTL ACTR 4CC:
   (1) If the fault continues:
   (2) If the fault continues:
  • Open the circuit breaker 5CC1
  • Remove the relay 13CC1
  • Close the circuit breaker 5CC1
  • Do a check of the correct Wiring for 28VDC signal (pin A2) and GND signal (pin X2) at the relay (13CC1), if no repair it ASM 226802
  • Open the circuit breaker 5CC1
  • Remove the FAC-1 (1CC1) AMM 22-66-34-000-002
  • Install the above removed relay (13CC1).
   (3) Do a check of the resistance of the RTL ACT VALID signal between the pin AB/11A and the pin AC/3 (GND signal) of the FAC-1 rack connector, ASM 226802 and ASM 226701.
NOTE: The resistance must be more than 70 Ohms and not open circuit.
     (a) If the resistance is not correct (< 70 Ohms or open circuit):
  • Do a check of the Wiring of the RTL ACT VALID signal from the FAC1 to the RTLU and associated GND signal at the RTLU ASM 226802.
       1 If the wiring is correct:
         a If the fault continues:
     (b) If the resistance is correct (no short circuit and no open circuit):
  • Do a check of the resistance of the RTL ACT PWR ON signal between the pin AE/11A and the pin AC/3 of the FAC-1 rack connector, ASM 226802 and ASM 226701.
NOTE: The resistance must be more than 70 Ohms and not open circuit.
       1 If the resistance is not correct (< 70 Ohms or open circuit):
  • Remove the relay 13CC1 (open the circuit breaker 5CC1 before and close it after)
  • Do a check of the Wiring of the RTL ACT PWR ON signal from the FAC1 to the relay 13CC1 ASM 226802.
         a If the wiring is correct:
       2 If the resistance is correct (RTL ACT VALID and RTL ACT PWR ON signals):
  • Do a check of the Wiring of the 28VDC and GND at the RTLU (PWR SPLY) ASM 226802.
         a If incorrect, repair the wiring.
         b If correct, replace the RELAY-RTL SYS1 [13CC1] .

If the fault continues:
   (4) If the fault continues:
   (5) If the fault continues:
  • Do a check and repair the remaining Wiring from the FAC 1 (1CC1) to the rudder travel limitation-unit (4CC) ASM 226802.
Subtask 22-61-00-810-052-D ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message AFS : FAC1/RTL ACTR 4CC:
   (1) If the fault continues:
   (2) If the fault continues:
  • Open the circuit breaker 5CC1
  • Remove the relay 13CC1
  • Close the circuit breaker 5CC1
  • Do a check of the correct Wiring for 28VDC signal (pin A2) and GND signal (pin X2) at the relay (13CC1), if no repair it ASM 226802
  • Open the circuit breaker 5CC1
  • Remove the FAC-1 (1CC1) AMM 22-66-34-000-002
  • Install the above removed relay (13CC1).
   (3) Do a check of the resistance of the RTL ACT VALID signal between the pin AB/11A and the pin AC/3 (GND signal) of the FAC-1 rack connector, ASM 226802 and ASM 226701.
NOTE: The resistance must be more than 70 Ohms and not open circuit.
     (a) If the resistance is not correct (< 70 Ohms or open circuit):
  • Do a check of the Wiring of the RTL ACT VALID signal from the FAC1 to the RTLU and associated GND signal at the RTLU ASM 226802.
       1 If the wiring is correct:
         a If the fault continues:
     (b) If the resistance is correct (no short circuit and no open circuit):
  • Do a check of the resistance of the RTL ACT PWR ON signal between the pin AE/11A and the pin AC/3 of the FAC-1 rack connector, ASM 226802 and ASM 226701.
NOTE: The resistance must be more than 70 Ohms and not open circuit.
       1 If the resistance is not correct (< 70 Ohms or open circuit):
  • Remove the relay 13CC1 (open the circuit breaker 5CC1 before and close it after)
  • Do a check of the Wiring of the RTL ACT PWR ON signal from the FAC1 to the relay 13CC1 ASM 226802.
         a If the wiring is correct:
       2 If the resistance is correct (RTL ACT VALID and RTL ACT PWR ON signals):
  • Do a check of the Wiring of the 28VDC and GND at the RTLU (PWR SPLY) ASM 226802.
         a If incorrect, repair the wiring.
         b If correct, replace the RELAY-RTL SYS1 [13CC1] .

If the fault continues:
   (4) If the fault continues:
   (5) If the fault continues:
  • Do a check and repair the remaining Wiring from the FAC 1 (1CC1) to the rudder travel limitation-unit (4CC) ASM 226802.
Subtask 22-61-00-710-055-A
B. If the test does not give the maintenance message AFS: FAC 1/RTL ACTR 4CC:
   (1) If the test gives the maintenance message TAT SENSOR (11FP1)/ADIRU1 (1FP1):
   (2) If the fault continues or if the test does not give the maintenance message TAT SENSOR
  • Do a check if any fault message related to FAC or RTL function is recorded in the PFR.
     (a) If no fault message is recorded:
  • No trouble shooting procedure is necessary.
     (b) If the fault message AFS: FAC1/RTL ACT 4CC is recorded:
     (c) If the fault continues:
Subtask 22-61-00-810-053-A
C. If the fault continues:
   (1) Do the operational test of the rudder travel limiting function AMM 22-61-00-710-001.
     (a) If the rudder does not move or stops before the rudder travel limit:
     (b) If the fault continues:
     (c) If the fault continues:
     (d) If the fault continues:
  • Do a check and repair the Wiring of the RTL V1 and RTL V2 discretes from the FAC 1 (1CC1) to the rudder travel limitation-unit (4CC), ASM 226802.
Subtask 22-61-00-710-056-A
D. Do the test given in Para. 3.B.
[Rev.8 from Aug 2018] 2026.04.04 04:25:10 UTC
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