DOC AIRBUS | TSM A320FTO Thrust Disagree on EWD when Derated TO Selected
1. Possible Causes
· EIU-1 ( 1KS1 )
· FCU ( 2CA )
· EEC ( 4000KS )
· EIU-2 ( 1KS2 )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 22-81-12-000-001 Removal of the FCU
Ref. AMM 22-81-12-400-001 Installation of the FCU
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 31-60-00-860-001 EIS Start Procedure
REFERENCE DESIGNATION
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
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. AMM 73-25-34-000-041 Removal of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-400-041 Installation of the Engine Interface Unit (EIU)
3. Fault Confirmation
Subtask 71-00-00-860-100-A
A. Job Set-up
(1) Aircraft Maintenance Configuration
Energize the aircraft electrical circuits
Ref. AMM 24-41-00-861-002 .
(2) Do the EIS start procedure (ECAM display units only) Ref. AMM 31-60-00-860-001 .
(3) Make sure that the two throttle control levers are in the idle position.
(4) Adjust the brightness of the MCDU 1 or 2 or 3 :
· Press PERF mode key. TAKE OFF page comes into view
· Enter a Derated T/O: D04 for example (it is possible to enter seven differents Derated T/O D04,
D08, D12, D16, D20, D24 or D40). Code D04 comes into view on the scratchpad
· Press the line key adjacent to the DRT TO-FLX TO indication. DERATED TO followed by
CONFIRM 04 %* comes into view
· Press the line key adjacent to the CONFIRM 04 %*. Code D04 comes into view under the DRT TOFLX
TO indication.
Subtask 71-00-00-700-051-A
B. Test
(1) On the maintenance panel 50VU:
· Push the ENG FADEC GND PWR 1 (2) pushbutton switch. The ON legend of this pushbutton
switch comes on.
(2) On the center pedestal, move the throttle control lever of the ENG1 to the MCT/FLTO detent point.
(3) On the upper right part of the EWD make sure that D04 followed by the N1 limit value come into view.
(4) If the display is not correct:
· Retard the throttle control lever of the ENG1 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR1 pushbutton switch. The ON
legend of this pushbutton switch goes off.
· Do the procedure given in Para. 4.A.
(5) If the display is correct:
· Retard the throttle control lever of the ENG1 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR1 pushbutton switch. The ON
legend of this pushbutton switch goes off
· Repeat the above step 1 to 3 for the ENG2.
(a) If the display is not correct:
· Retard the throttle control lever of the ENG2 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR2 pushbutton switch. The
ON legend of this pushbutton switch goes off.
· Do the procedure given in Para. 4.B.
(b) If the display is correct:
· Retard the throttle control lever of the ENG2 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR2 pushbutton switch. The
ON legend of this pushbutton switch goes off.
(6) On the MCDU:
· Make sure that TAKE OFF page is present
· Press CLR key. CLR comes into view on the scratchpad
· Press the line key adjacent to the DRT TO-FLX TO indication
· Make sure that the D04 indication is cleared
· Press MCDU MENU key. MCDU MENU page comes into view.
4. Fault Isolation
Subtask 71-00-00-810-153-A
A. Replace the EIU-1 ( 1KS1 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041
· Repeat Para. 3.B.(1) to 3.B.(3).
(1) If the display is not correct:
· Retard the throttle control lever of the ENG1 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR1 pushbutton switch. The ON
legend of this pushbutton switch goes off
· Replace the FCU ( 2CA ) , Ref. AMM 22-81-12-000-001 and Ref. AMM 22-81-12-400-001 .
· Repeat Para. 3.B.(1) to 3.B.(3).
(2) If the display is not correct:
· Retard the throttle control lever of the ENG1 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR1 pushbutton switch. The ON
legend of this pushbutton switch goes off
· On engine 1, replace the EEC ( 4000KS ) , Ref. AMM 73-22-34-000-010 and Ref.
AMM 73-22-34-400-010 .
Subtask 71-00-00-810-154-A
B. Replace the EIU-2 ( 1KS2 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041
· Repeat Para. 3.B.(1) to 3.B.(3).
(1) If the display is not correct:
· Retard the throttle control lever of the ENG2 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR2 pushbutton switch. The ON
legend of this pushbutton switch goes off
· Replace the FCU ( 2CA ) , Ref. AMM 22-81-12-000-001 and Ref. AMM 22-81-12-400-001 .
· Repeat Para. 3.B(1) to 3.B.(3).
(2) If the display is not correct:
· Retard the throttle control lever of the ENG2 to the idle stop
· On the maintenance panel 50VU, push the ENG FADEC GND PWR2 pushbutton switch. The ON
legend of this pushbutton switch goes off
· On engine 2, replace the EEC ( 4000KS ) , Ref. AMM 73-22-34-000-010 and Ref.
AMM 73-22-34-400-010 .
5. Close-up
Subtask 71-00-00-860-101-A
A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure Ref. AMM 31-60-00-860-002 .
(2) Fully decrease the brightness of the MCDU screen (display off).
(3) De-energize the aircraft electrical circuits
Ref. AMM 24-41-00-862-002 .
Figure 71(IAE)-00-00-991-00300-13-A- / SHEET 1/5 - Smoke and/or Oil Smell in the Cabin Due to an Engine
Leakage
Figure 71(IAE)-00-00-991-00300-13-A- / SHEET 2/5 - Smoke and/or Oil Smell in the Cabin Due to an Engine
Leakage
Figure 71(IAE)-00-00-991-00300-13-A- / SHEET 3/5 - Smoke and/or Oil Smell in the Cabin Due to an Engine
Leakage
Figure 71(IAE)-00-00-991-00300-13-A- / SHEET 4/5 - Smoke and/or Oil Smell in the Cabin Due to an Engine
Leakage
Figure 71(IAE)-00-00-991-00300-13-A- / SHEET 5/5 - Smoke and/or Oil Smell in the Cabin Due to an Engine
Leakage
Figure 71(IAE)-00-00-991-00100-13-A- / SHEET 1/1 - Surge or Stall on Engine 1 (2)
71-70 - (IAE) - POWER PLANT DRAINS
71-70-00 - (IAE) - POWER PLANT DRAINS
71-70-00 PB 201 CONF 13 - POWER PLANT DRAINS - FAULT ISOLATION PROCEDURES [Rev.6 from Feb 2017] 2026.04.04 04:35:07 UTC