2_ If there is a ground signal:
 - do a check and repair the wiring between AUDIO SWITCHING
 selector switch (16RN) pin 16 and AMU (1RN) pin AA/15K (Ref.

 ASM 23-51/04).
 B. Do the test given in Para. 3.

 TASK 23-51-00-810-844
 Loss of the AUDIO 3XFRD Indication after the AUDIO SWITCHING Selector Switch is set to CAPT/3
 1. Possible Causes
_______________
 - SEL SW-AUDIO SWITCHING (16RN)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
IPC 235108 AMM 23-51-00-710-003 Operational Test of the CAPT and F/O ACPs Switching R to the 3rd OCCUPANT ACP ASM 23-51/04
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the Captain ACP switching to the Third Occupant ACP (Ref. AMM TASK 23-51-00-710-003).
 NOTE : Do this test for the Captain station only.
____
 4. Fault Isolation
_______________
 A. If the AUDIO 3XFRD indication does not come into view on the upper display unit of the ECAM system:
 - replace the SEL SW-AUDIO SWITCHING (16RN) (Ref. IPC 235108).
 (1) If the fault continues:
 - do a check for a ground signal at pin 1 of the AUDIO SWITCHING selector switch (16RN) (Ref. ASM 23-51/04).
 (a) If there is no ground signal:

 - repair the wiring between the AUDIO SWITCHING selector switch (16RN) and the ground terminal (Ref. ASM 23-51/04).

 (b) If there is a ground signal:

 - do a check and repair the wiring between AUDIO SWITCHING selector switch (16RN) pin 2 and the first terminal block (Ref. ASM 23-51/04).
 B. Do the test given in Para. 3.
 「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 ∞∞23-51-00∞∞∞∞∞∞∞∞∞∞Page 268
 May 01/05 CES

 TASK 23-51-00-810-845
 Loss of the AUDIO 3XFRD Indication after the AUDIO SWITCHING Selector Switch is set to F/O/3
 1. Possible Causes
_______________
 - SEL SW-AUDIO SWITCHING (16RN)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
IPC 235108 AMM 23-51-00-710-003 Operational Test of the CAPT and F/O ACPs Switching R to the 3rd OCCUPANT ACP ASM 23-51/04
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the First Officer ACP switching to the Third Occupant ACP (Ref. AMM TASK 23-51-00-710-003).
 NOTE : Do this test for the First Officer station only.
____
 4. Fault Isolation
_______________
 A. If the AUDIO 3XFRD indication does not come into view on the upper display unit of the ECAM system:
 - replace the SEL SW-AUDIO SWITCHING (16RN) (Ref. IPC 235108).
 (1) If the fault continues:
 - do a check for a ground signal at pin 1 of the AUDIO SWITCHING selector switch (16RN) (Ref. ASM 23-51/04).
 (a) If there is no ground signal:

 - repair the wiring between the AUDIO SWITCHING selector switch (16RN) and the ground terminal (Ref. ASM 23-51/04).

 (b) If there is a ground signal:

 - do a check and repair the wiring between AUDIO SWITCHING selector switch (16RN) pin 4 and the first terminal block (Ref. ASM 23-51/04).
 B. Do the test given in Para. 3.
 「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 ∞∞23-51-00∞∞∞∞∞∞∞∞∞∞Page 269
 May 01/05 CES

 TASK 23-51-00-810-846 Loss of the BUS 4 Data from the CFDIU to the AMU
 1. Possible Causes
_______________
 - AMU (1RN)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
　
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