(2) If the DISCH legend comes on:

 - replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring of the FIRE TEST (LOOP A) discrete from the engine 1 FDU (2WD1) to the ENG/APU FIRE panel (1WD) (Ref. ASM 26-12/02).
 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 ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 270
 Feb 01/04R
 CES  Loss of the FIRE TEST (LOOP B) Discrete Input from the Engine 1 FDU

 1. Possible Causes
_______________
 - ENG/APU FIRE PNL (1WD)

 - wiring of the 28VDC signal from the circuit breaker (8WD1) to the ENG/APU FIRE panel (1WD)

 - wiring of the FIRE TEST (LOOP B) discrete from the engine 1 FDU (2WD1) to the ENG/APU FIRE panel (1WD)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  AMM 26-12-00-710-001 Operational Check of Loop/Squib AMM 26-12-12-000-001 Removal of the ENG/APU Fire Panel (1WD) AMM 26-12-12-400-001 Installation of the ENG/APU Fire Panel (1WD) ASM 26-12/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the engine fire and overheat detection (loop/squib) (Ref. AMM TASK 26-12-00-710-001).
 4. Fault Isolation
_______________
 A. If the ENG 1 FIRE indication does not come into view on the upper ECAM DU:
 - do a check to see if the DISCH legend of the ENG 1/AGENT 2 pushbutton switch on the ENG/APU FIRE panel (1WD) comes on during the fire test.
 (1) If the DISCH legend does not come on:

 - replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring of the 28VDC signal from the circuit breaker (8WD1) to the ENG/APU FIRE panel (1WD), pin B/M (Ref. ASM 26-12/02).

 (2) If the DISCH legend comes on:

 - replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring of the FIRE TEST (LOOP B) discrete from the engine 1 FDU (2WD1) to the ENG/APU FIRE panel (1WD) (Ref. ASM 26-12/02).
 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 ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 272
 Feb 01/04R
 CES  Loss of the FIRE TEST (LOOP A) Discrete Input from the Engine 2 FDU

 1. Possible Causes
_______________
 - ENG/APU FIRE PNL (1WD)

 - wiring of the 28VDC signal from the circuit breaker (7WD2) to the ENG/APU FIRE panel (1WD)

 - wiring of the FIRE TEST (LOOP A) discrete from the engine 2 FDU (2WD2) to the ENG/APU FIRE panel (1WD)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  AMM 26-12-00-710-001 Operational Check of Loop/Squib AMM 26-12-12-000-001 Removal of the ENG/APU Fire Panel (1WD) AMM 26-12-12-400-001 Installation of the ENG/APU Fire Panel (1WD) ASM 26-12/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the engine fire and overheat detection (loop/squib) (Ref. AMM TASK 26-12-00-710-001).
 4. Fault Isolation
_______________
 A. If the ENG 2 FIRE indication does not come into view on the upper ECAM DU and if the FIRE legend of the ENG/2 FIRE/FAULT annunciator does not come on on the ENG panel 115VU:
 - do a check to see if the DISCH legend of the ENG 2 AGENT 2 pushbutton switch on the ENG/APU FIRE panel (1WD) comes on during the fire test.
 (1) If the DISCH legend does not come on:

 - replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring of the 28VDC signal from the circuit breaker (7WD2) to the ENG/APU FIRE panel (1WD), pin C/M (Ref. ASM 26-12/02).
　
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