W DOC AIRBUS | AMM A320F

Functional Test of the Electronic Control Unit (ECU) [CFMI]

TASK 73-21-60-720-040-A
Functional Test of the Electronic Control Unit (ECU)

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL
FIN: 4000KS ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
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
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-10-00-710-001-A
Operational Check of Hydraulic Fire Shut Off Valves and Associated Indicating System
3. Job Set-up
Subtask 73-21-60-861-056-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 73-21-60-865-053-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUENGINE/1 AND 2/IGN/SYS A1JHA03
FOR FIN: 1000EM1 (ENGINE1)
49VUENGINE/1/FADEC A/AND EIU 12KS1A04
121VUENGINE/IGN/ENG1/SYS B3JH1P41
121VUENGINE/IGN/ENG1/SYS A BAT2JH1P39
121VUENGINE/ENG1/FADEC B/AND EIU 14KS1R41
FOR FIN: 1000EM2 (ENGINE2)
49VUENGINE/2/FADEC A/AND EIU 22KS2A05
121VUENGINE/IGN/ENG2/SYS B3JH2P42
121VUENGINE/IGN/ENG2/SYS A BAT2JH2P40
121VUENGINE/ENG2/FADEC B4KS2Q40
Subtask 73-21-60-869-059-A ** ON A/C NOT FOR ALL
C. Safety Precautions
NOTE: If you open circuit breakers 2KS1 (2KS2), 4KS1 (4KS2) before paragraph B. stop for 5 minutes, then start the procedure.
Subtask 73-21-60-865-054-A ** ON A/C NOT FOR ALL
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE2Q42
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q41
Subtask 73-21-60-869-057-A ** ON A/C NOT FOR ALL
E. Aircraft Maintenance Configuration
   (1) On the ENG panel 115VU, make sure that:
  • the ENG MODE CRANK/NORM/IGN/START selector switch is set to NORM.
  • the ENG MASTER 1(2) control switch is set to OFF.
   (2) On the overhead CTL & IND panel 22VU, make sure that the ENG MAN START 1(2) pushbutton switch is released.
   (3) On ECAM control panel push CLR pushbutton switch so as to have the STATUS page.
4. Procedure
Subtask 73-21-60-720-051-E ** ON A/C NOT FOR ALL
WARNING: BEFORE YOU PUSH THE MAN START PUSHBUTTON SWITCH, MAKE SURE THAT, ON THE ECAM DISPLAY UNIT, THE PRESSURE AT THE STARTER VALVE INLET IS ZERO PSI. IF THE PRESSURE IS NOT ZERO PSI, THE ENGINE CAN ROTATE AND CAUSE INJURY.
WARNING: DO NOT WORK ON THE IGNITION SYSTEM WHEN:
  • THE MASTER CONTROL SWITCH IS IN THE ON POSITION
AND
  • THE ENG/MODE SELECTOR SWITCH IS IN THE IGN/START POSITION.
IN THIS CONFIGURATION THE IGNITION SYSTEM IS ENERGIZED WITH HIGH VOLTAGE CURRENT THAT CAN BE DANGEROUS.
A. Functional Test of the ECU
NOTE: Ignore the warnings (ECAM, audio) related to the circuit breaker monitoring.
NOTE: This test is for the system 1. For the other system(s), use the indications between the parentheses.
ACTION
RESULT
1.On the maintenance panel 50VU, make sure that the FADEC GND PWR ENG1(ENG2) pushbutton switch is released (on the pushbutton switch the ON legend is on).
The upper display unit of the ECAM system shows:
  • N1 = 0
  • N2 = 0
  • FF = 0
  • EGT = ambient temperature.
2.Push and then push again to release the FADEC GND PWR ENG1(ENG2) pushbutton switch.
  • On the pushbutton switch, the ON legend goes off then comes on.
  • On the upper display unit of the ECAM system, the engine parameters go out of view then come into view.
3.On the overhead panel 20VU, lift the guard on the ENG1(2) FIRE pushbutton switch. Push to release the pushbutton switch.
NOTE: After operation of the ENG1(2) FIRE pushbutton switch, do the operational test of the hydraulic fire shut-off valves (Ref. AMM TASK 29-10-00-710-001).
  • The single chime sounds.
    On the F/O glareshield panel 130VU and captain glareshield panel 131VU :
  • The MASTER CAUT light comes on.
    On the upper display unit of the ECAM system:
  • The engine parameters go out of view (XX):
  • The warning message:
    ENG1(2) SHUT DOWN shows.
4.Push the ENG1(2) FIRE pushbutton switch. Lower the guard on the ENG1(2) FIRE pushbutton switch.
On the F/O glareshield panel 130VU and captain glareshield panel 131VU:
  • The MASTER CAUT light goes out of view.
    On the upper display unit of the ECAM system:
  • The engine parameters come into view.
  • The warning message:
    ENG1(2) SHUT DOWN goes out of view.
5.On the ENG panel 115VU, set the ENG MODE CRANK/NORM/IGN/START selector switch to IGN/START.
On the lower display unit of the ECAM system:
  • The IGN indication and the symbol for the pneumatic starter valve come into view.
6.On the overhead CTL & IND panel 22VU, push the ENG MAN START 1(2) pushbutton switch.
  • On the pushbutton switch, the ON legend comes on.
  • The single chime sounds
  • On the F/O glareshield panel 130VU and captain glareshield panel 131VU, the MASTER CAUT light comes on.

On the ECAM upper display unit:
  • The EGT limit on the EGT indicator must decrease and become stable at approximately 700 deg.C (1292 deg.F).
  • The warning message:
    ENG1(2) START VALVE FAULT
    -START VALVE NOT OPEN comes on.
7.On the overhead circuit breaker panel 49VU, open the circuit breaker: 1JH
On the rear circuit breaker panel 121VU, open the circuit breakers: 2JH1(2), 3JH1(2)
On the ENG panel 115VU:
set the ENG MASTER 1(2) control switch to ON.
The single chime operates.
On the lower display unit of the ECAM system:
  • The system A-B indication comes into view.

On the upper display unit of the ECAM system:
  • This warning message appears:
    ENG1(2) IGN A+B FAULT
8.On the ENG panel 115VU, set the ENG MASTER 1(2) control switch to OFF.
On the lower display unit of the ECAM system, the system A-B indication goes out of view.
On the upper display unit of the ECAM system:
  • This warning message goes out of view:
    ENG1(2) IGN A+B FAULT
9.On the ENG panel 115VU, set the ENG MODE CRANK/NORM/IGN/START selector switch to NORM.
On the upper display unit of the ECAM system:
  • The EGT limit on the EGT indicator goes to its initial position.

On the lower display unit of the ECAM system the ignition indications and the symbol for the starter valve go out of view.
10.On the overhead circuit breaker panel 49VU, close the circuit breaker: 1JH
On the rear circuit breaker panel 121VU, close the circuit breakers: 2JH1(2), 3JH1(2)

11.On the overhead CTL & IND panel 22VU, release the ENG MAN START 1(2) pushbutton switch.
On the pushbutton switch:
  • The ON legend goes off.
12.On the ENG panel 115VU, set the ENG MASTER 1(2) control switch to ON then to OFF.
On the F/O glareshield panel 130VU and captain glareshield panel 131VU:
  • The MASTER CAUT light goes off.

On the upper display unit of the ECAM system:
  • the warning message:
    ENG1(2) START VALVE FAULT
    -START VALVE NOT OPEN
    goes out of view.
  • The engine parameters go out of view (XX), then come into view.
13.Set the ENG1(2) throttle control lever to:
  • CL, MCT, TO-GA.
On the upper display unit of the ECAM system:
  • Make sure that the indications agree with the position of the throttle control lever.
  • When the throttle control lever is set to TO-GA.
  • Make sure that the N1 THR (circle) moves to the upper N1 limit.
NOTE: With the throttle control lever at less than the CL detent on the quadrant, CL will continuously show. If one or the two throttle control levers are above CL, MCT/FLEX will show, if one or the two throttle control levers are above the MCT detent, TO-GA will show.

14.Set the ENG1(2) throttle control lever to REV IDLE.
On the upper display unit of the ECAM system:
  • Make sure that the N1 limit decreases.
15.Set the ENG1(2) throttle control lever to FULL REV.
On the upper display unit of the ECAM system:
  • Make sure that the N1 THR (circle) moves to the new upper N1 limit.
16.Set the ENG1(2) throttle control lever to O.
On the upper display unit of the ECAM system:
  • The N1 THR (circle) and N1 limit move to their initial positions.
FOR ENGINE 1

17.On the overhead circuit breaker panel 49VU, open the circuit breaker: 2KS1
On the upper display unit of the ECAM system:
  • This warning message comes into view:
    ENG1 FADEC A FAULT
18.On the rear circuit breaker panel 121VU, open the circuit breaker: 4KS1
The single chime sounds.

On the upper display unit of the ECAM system:
  • The engine parameters go out of view (XX).
  • The warning messages:
    ENG1 FADEC FAULT comes into view.

On the lower display unit of the ECAM system:
  • Engine parameter for OIL TEMP goes out of view (XX) or (00) with Bleed Monitoring Computer P/N 733901-1-1 and P/N 733901-1-2.
19.On the overhead circuit breaker panel 49VU, close the circuit breaker: 2KS1
On the upper display unit of the ECAM system:
  • The engine parameters come into view
  • The warning message:
    ENG1 FADEC FAULT
    goes out of view.
  • The warning message:
    ENG1 FADEC B FAULT
    shows.

On the lower display unit of the ECAM system:
  • Engine parameter for OIL TEMP comes into view.

On the F/O glareshield panel 130VU and captain glareshield panel 131VU:
  • The MASTER CAUT warning light goes off.
20.On the rear circuit breaker panel 121VU, close the circuit breaker: 4KS1
On the upper display unit of the ECAM system:
  • The warning message:
    ENG1 FADEC B FAULT
    goes out of view.
FOR ENGINE 2

21.On the overhead circuit breaker panel 49VU, open the circuit breaker: 2KS2
On the upper display unit of the ECAM system:
  • This warning message shows:
    ENG2 FADEC A FAULT

On the lower display unit of the ECAM system:
  • Engine parameter for OIL TEMP goes out of view (XX) or (00) with Bleed Monitoring Computer P/N 733901-1- and P/N 733901-1-2.
22.On the rear circuit breaker panel 121VU, open the circuit breaker: 4KS2
The single chime operates.

On the upper display unit of the ECAM system:
  • The engine parameters go out of view (XX)
  • This warning message:
    ENG2 FADEC FAULT comes into view.
23.On the overhead circuit breaker panel 49VU, close the circuit breaker: 2KS2
On the upper display unit of the ECAM system:
  • The engine parameters come into view again
  • The warning message:
    ENG2 FADEC FAULT
    goes out of view.
  • The warning message:
    ENG2 FADEC B FAULT
    shows.

On the lower display unit of the ECAM system:
  • Engine parameter for OIL TEMP comes into view.

On the F/O glareshield panel 130VU and captain glareshield panel 131VU:
  • The MASTER CAUT light goes off.
24.On the rear circuit breaker panel 121VU, close the circuit breaker: 4KS2
On the upper display unit of the ECAM system:
  • The warning messages:
    ENG2 FADEC B FAULT
    C/B TRIPPED REAR PNL N-R
    go out of view.
5. Close-up
Subtask 73-21-60-869-058-A ** ON A/C NOT FOR ALL
A. On the maintenance panel 50VU, push the FADEC GND PWR ENG1(ENG2) pushbutton switch. On the pushbutton switch, the ON legend goes off.
Subtask 73-21-60-862-056-A ** ON A/C NOT FOR ALL
B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
Subtask 73-21-60-865-055-A ** ON A/C NOT FOR ALL
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE2Q42
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q41
[Rev.10 from 2021] 2026.04.01 02:56:47 UTC
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