DOC AIRBUS | TSM A320FLoss of the Engine Position Indication on Engine 1
1. Possible Causes
· wiring
· EEC ( 4000KS )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
Ref. AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External
Power
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
Ref. AMM 70-23-15-912-010 Connection of Electrical Connectors
Ref. AMM 71-00-00-710-018 Discontinued Start, Restart and Shutdown Procedures
Ref. AMM 71-00-00-710-043 Normal Engine Automatic Start Procedure
Ref. AMM 71-00-00-710-047 Normal Engine Manual Start Procedure
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 71-50-00-210-010 Wire Harness Visual Inspection - All Power Plant Electrical Cables
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. ASM 73-25-05
Engine 1 Position Indication SHEET 1
Figure 73(IAE)-22-00-991-00800-A / SHEET 1/1 - Engine 1 Position Indication not printed, as per
printing preferences
3. Fault Confirmation
Subtask 73-22-00-860-110-A
A. Job Set-up
(1) Energize the aircraft electrical circuits
Ref. AMM 24-41-00-861-002 .
(2) On the panel 50VU, release the ENG FADEC GND PWR 1 pushbutton switch.
Subtask 73-22-00-710-140-A
B. Test
(1) On the panel 50VU, push the ENG FADEC GND PWR 1 pushbutton switch and release it again.
NOTE: This action resets the FADEC memory.
(2) Adjust the brightness of the MCDU screen.
(3) Push the INIT mode key. The INIT page comes into view.
(4) Enter a new flight number.
(5) Start the engine 1 by the normal engine automatic start procedure Ref. AMM 71-00-00-710-043 or
the normal engine manual start procedure Ref. AMM 71-00-00-710-047 .
NOTE: Operation of the engine for at least 3 minutes erases the LAST LEG REPORT related to the
last flight and the new fault is recorded in the EEC LAST LEG REPORT.
(6) Do a shutdown of the engine 1 by the discontinued start, restart and shutdown procedure Ref.
AMM 71-00-00-710-018 .
(7) Read the scheduled maintenance report of the FADEC (1A and 1B) menu on the MCDU (Ref.
70-00-00 Page Block 301 Task Supporting Data).
(a) Make a record of the maintenance message.
(b) Make a record of the channel FADEC 1A or FADEC 1B which found the fault.
(8) Fully decrease the brightness of the MCDU screen (display off).
4. Fault Isolation
(Ref. Fig. Engine 1 Position Indication SHEET 1)
Subtask 73-22-00-810-099-A
A. If the test gives the maintenance message ENG POS INDIC HC/EEC1:
· examine the harness Ref. AMM 71-50-00-210-010 from the EEC (4000KS) to the connector (407VC1)
Ref. ASM 73-25-05.
(1) If the fault continues:
· disconnect the connector (407VC1-A)
· examine the connector and receptacle Ref. AMM 71-50-00-210-010
· connect the connector (407VC1-A) Ref. AMM 70-23-15-912-010 .
(2) If the channel which found the fault (during the test) was FADEC 1A and the fault continues:
· do a check and repair the:
. wiring from the EEC (4000KS) to the connector (407VC1-A): pins J1/r, t to pins
23, 22 Ref. ASM 73-25-05
. wiring at the connector (407VC1) between pins 22 and 23 Ref. ASM 73-25-05.
(3) If the channel which found the fault (during the test) was FADEC 1B and the fault continues:
· do a check and repair the:
. wiring from the EEC (4000KS) to the connector (407VC1-A): pins J7/r, t to pins
23, 22 Ref. ASM 73-25-05
. wiring at the connector (407VC1) between pins 22 and 23 Ref. ASM 73-25-05.
(4) If the fault continues:
· replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-22-00-710-141-A
B. Do the test given in Para. 3.
5. Close-up
Subtask 73-22-00-860-111-A
A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
Ref. AMM 31-60-00-860-002 .
(2) On the panel 50VU, push the ENG FADEC GND PWR 1 pushbutton switch.
(3) De-energize the aircraft electrical circuits
Ref. AMM 24-41-00-862-002 .
(4) Make sure that the fan cowls 437AL and 438AR are closed Ref. AMM 71-13-00-410-010 . [Rev.6 from Feb 2017] 2026.04.04 04:36:18 UTC