3. Fault Confirmation
__________________
A. Job Set-Up
Installation of the Transducer Units
(4CE1,4CE2,4CE3,4CE4)
Operational Test of the Elevator and Aileron
Computers (ELACs)
Removal of the ELAC (2CE1,2CE2)
Installation of the ELAC (2CE1,2CE2)
Removal of the FCDC (3CE1,3CE2)
Installation of the FCDC (3CE1,3CE2)
BITE Test of the EFCS (Ground Scanning)
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the hydraulic systems are depressurized.
(3) On the overhead panel 24VU:
- release the FLT CTL/ELAC 2 pushbutton switch (the OFF legend of the FLT CTL/ELAC 2 pushbutton switch comes on).
(4) On the overhead panel 24VU:
- push the FLT CTL/ELAC 2 pushbutton switch (the OFF legend of the FLT CTL/ELAC 2 pushbutton switch goes off).
NOTE : In case of a reset of the ELAC2 with the circuit breaker, the
____
supply breaking must be more than 5 seconds.
NOTE : If the ELAC FAULT warning disappears after several resets,
____
replace the computer.
「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 ∞∞27-93-00∞∞∞∞∞∞∞∞∞∞Page B218
Aug 01/05R
CES
B. Test
(1) Do the BITE test of the EFCS (ground scanning) (Ref. AMM TASK 27-96-00-740-001).
NOTE : If the ground scanning does not give the maintenance message
____ ELAC2, do the trouble shooting procedure (Ref. TASK 27-93-00-810-947).
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. If the test confirms the fault:
- Do the operational test of the ELACs (Ref. AMM TASK 27-93-00-710-001) to make sure that the ELAC 2 servoes its associated surfaces.
(1) If the flight controls move according to the ELAC 2 servoing:
(a) Remove the ELAC-2 (2CE2) (Ref. AMM TASK 27-93-34-000-001).
(b) At the ELAC 2 receptacle, do a check of the resistance between pin AB/11J and pin AE/14C (Ref. ASM 27-92/03).
1 If the resistance is less than 280 ohms:
_
a Remove the RELAY-ELAC 2 ANN SPLY (40CE2) (Ref. IPC
_
27920803).
b Do a check of the resistance of the relay between pin X1
_ and pin X2 (Ref. ASM 27-92/03).
- If the resistance is less than 280 ohms: . replace the RELAY-ELAC 2 ANN SPLY (40CE2) (Ref. IPC 27920803) . replace the ELAC-2 (2CE2) (Ref. AMM TASK 27-93-34-400-001).
- If the resistance is between 280 and 400 ohms: . do a check and repair the wiring of the RLY ELAC FAULT signal from the relay to the ELAC 2 (Ref. ASM 27-92/03) . install the relay . replace the ELAC-2 (2CE2) (Ref. AMM TASK 27-93-34-400-001).
2 If the resistance is more than 400 ohms:
_
a Remove the relay 40CE2.
_
b Do a check of the resistance of the relay between pins X1
_ and X2 (Ref. ASM 27-92/03).
- If the resistance is more than 400 ohms:
「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 ∞∞27-93-00∞∞∞∞∞∞∞∞∞∞Page B219
Aug 01/05 CES
3
_
. replace the RELAY-ELAC 2 ANN SPLY (40CE2) (Ref. IPC
27920803)
. install the ELAC 2 (Ref. AMM TASK 27-93-34-400-001).
- If the resistance is between 280 and 400 ohms: . do a check and repair the wiring of the RLY ELAC FAULT signal from the relay to the ELAC 2. (Ref. ASM 27-92/03) . install the relay . install the ELAC 2 (Ref. AMM TASK 27-93-34-400-001).
If the resistance is between 280 and 400 ohms:
a_ Remove the FCDC-1 (3CE1) (Ref. AMM TASK 27-95-34-000-001).
- if the warning ELAC2 stays:
. install the FCDC-1 (3CE1) (Ref. AMM TASK 27-95-34-400-
001).
. continue the trouble shooting at Para. b_.
- if the warning ELAC2 goes off, replace the FCDC-1 (3CE1)
(Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-
95-34-400-001).
- install the ELAC 2 (Ref. AMM TASK 27-93-34-400-001).
b Remove the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001).
_
- if the warning ELAC2 stays: . install the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-400-001). . continue the trouble shooting at Para. c_.
- if the warning ELAC2 goes off, replace the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-95-34-400-001).
- install the ELAC 2 (Ref. AMM TASK 27-93-34-400-001). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 飞行操纵 3(62)
