B. Test
R (1) Open the circuit breaker 5CC2.
R (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
_______________
A. If the test gives the maintenance message AFS : FAC2/RTL ACTR 4CC:
- remove the relay 13CC2 (open the circuit breaker 5CC2 before and close it after)
- do a check of the correct wiring for 28VDC signal (pin A2) and GND signal (pin X2) at the relay (13CC2), if no repair it (Ref. ASM 22-68/02)
- open the circuit breaker 5CC2
- remove the FAC-2 (1CC2) (Ref. AMM TASK 22-66-34-000-002)
- install the aboved removed relay (13CC2).
(1) Do a check of the impedance of the RTL ACT VALID signal between the pin AB/11A and the pin AC/3 (GND signal) of the FAC-2 rack connector.
NOTE : The impedance must be more than 70 Ohms and not open circuit.
____
(a) If the impedance is not correct (< 70 Ohms or open circuit):
- do a check of the wiring of the RTL ACT VALID signal from the FAC2 to the RTLU and associated GND signal at the RTLU (Ref. ASM 22-68/02).
1 If the wiring is correct:
_
- install the above removed FAC-2 (Ref. AMM TASK 22-66-34-400-002)
- replace the electronic module of the rudder travel-limitation unit (4CC) (Ref. AMM TASK 27-23-51-000-002) and (Ref. AMM TASK 27-23-51-400-002).
a If the fault continues:
_
- replace the LIMITATION UNIT-RUDDER TRAVEL (4CC) (Ref. AMM TASK 27-23-51-000-001) and (Ref. AMM TASK 27-23-51-400-001).
(b) If the impedance is correct (no short circuit and no open circuit):
- do a check of the impedance of the RTL ACT PWR ON signal between the pin AE/11A and the pin AC/3 of the FAC-2 rack connector, (Ref. ASM 22-68/02) and (Ref. ASM 22-67/01).
「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 ∞∞22-61-00∞∞∞∞∞∞∞∞∞∞Page 210
Nov 01/98 CESR NOTE : The impedance must be more than 70 Ohms and not open
____ R circuit.
R 1_ If the impedance is not correct (< 70 Ohms or open circuit)
R - remove the relay 13CC2 (open the circuit breaker 5CC2 and
R close it after)
R - do a check of the wiring of the RTL ACT PWR ON signal from
R the FAC2 to the relay 13CC2 (Ref. ASM 22-68/02).
R a_ If the wiring is correct:
R
- replace the RELAY-RTL SYS2 (13CC2)
- install the above removed FAC-2 (Ref. AMM TASK 22-66-34-
400-002). R
R 2_ If the impedance is correct (RTL ACT VALID and RTL ACT PWR ONR signals): R - do a check of the wiring of the 28VDC signal from the relay R 13CC2 to the RTLU and associated GND at the RTLU (Ref. ASM
22-68/02). R
R a_ If incorrect, repair the wiring.
R
R b_ If correct, replace the RELAY-RTL SYS2 (13CC2).
R
R If the fault continues:
R - replace the FAC-2 (1CC2) (Ref. AMM TASK 22-66-34-400-002)
(2) If the fault continues:
- do a check and repair the remaining wiring from the FAC 2 (1CC2) to the rudder travel-limitation unit (4CC) (Ref. ASM 22-68/02).
B. If the test does not give the maintenance message AFS: FAC 2/RTL ACTR 4CC:
- do the operational test of the rudder travel limiting function (Ref. AMM TASK 22-61-00-710-001).
C. If the rudder does not move or stops before the rudder travel limit:
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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(89)
