All engine 2 parameters are XX on the upper ECAM DU on the ground with the FADEC GND PWR pushbutton switch set to ON.

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1. Possible Causes
· wiring between the FADEC GND PWR pushbutton switch (7KS2) and the EIU 2 (1KS2)
· P/BSW-ENG/FADEC GND PWR/ 2 (7KS2)
2 Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
REFERENCE QTY DESIGNATION
No specific AR SAFETY CLIP - CIRCUIT BREAKER
B. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 31-60-00-860-001 EIS Start Procedure
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
Ref. AMM 73-22-34-710-040 Operational Test of the EEC
Ref. ASM 73-25-08
3. Fault Confirmation
Subtask 73-22-00-865-052-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANEL DESIGNATION FIN LOCATION
49VU ENGINE/2/FADEC A/AND EIU 2 2KS2 A05
49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42
121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
121VU ENGINE/ENG2/FADEC B/AND EIU 2 4KS2 Q40
Subtask 73-22-00-860-184-A
B. Aircraft Maintenance Configuration
NOTE: If the circuit breakers 2KS2, 4KS2 are opened, stop for 5 minutes before you start the procedure.
Subtask 73-22-00-865-053-A
C. Open, safety and tag this(these) circuit breaker(s):
PANEL DESIGNATION FIN LOCATION
121VU ENGINE/ENG1 AND 2 FIRE EXTIG/
BTL1/SQUIB/B
2WE1 Q44
121VU ENGINE/ENG1 AND 2 FIRE EXTIG/
BTL1/SQUIB/A
1WE1 Q43
121VU ENGINE/ENG1 AND 2 FIRE EXTIG/
BTL2/SQUIB/B
2WE2 Q42
121VU ENGINE/ENG1 AND 2 FIRE EXTIG/
BTL2/SQUIB/A
1WE2 Q41
Subtask 73-22-00-860-185-A
D. Job Set-Up
(1) On the ENG panel 115VU, make sure that:
(a) The ENG/MODE/CRANK/AUTO IGN/IGN selector switch is set to NORM.
(b) The ENG MASTER 2 switch is set to OFF.
(2) On the overhead control and indicating panel 22VU, make sure that the ENG/MAN START/2
pushbutton switch is released.
(3) Do the EIS start procedure Ref. AMM 31-60-00-860-001 .
Subtask 73-22-00-710-246-A
E. Do this test:
ACTION RESULT
1.On the panel 115VU, set the ENG/MODE/
CRANK/AUTO IGN/IGN selector switch to IGN
START.
The upper display unit of the ECAM system does not
show XX but shows engine parameters:
· N1 = 0
· N2 = 0
· FF = 0
· EGT = ambient temperature
4. Fault Isolation
Subtask 73-22-00-810-170-A
A. If the test is confirmed:
(1) Do a check and repair the wiring between the FADEC GND PWR pushbutton switch (7KS2) and the
EIU 2 (1KS2) , Ref. ASM 73-25-08.
(2) If the fault continues:
· Replace the P/BSW-ENG/FADEC GND PWR/ 2 (7KS2) .
Subtask 73-22-00-720-050-A
B. Do the operational test of the EEC Ref. AMM 73-22-34-710-040 .
5. Close-up
Subtask 73-22-00-860-186-A
A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure Ref. AMM 31-60-00-860-002 . [Rev.6 from Feb 2017] 2026.04.04 04:36:20 UTC