DOC AIRBUS | AMM A320FAPU Performance Parameters
TASK 49-00-00-720-002-A
APU Performance Parameters
Self explanatory
2. Job Set-up Information
A. Referenced Information
3. Job Set-up
Subtask 49-00-00-860-137-A ** ON A/C NOT FOR ALL
Subtask 49-00-00-710-060-A ** ON A/C NOT FOR ALL
Subtask 49-00-00-860-138-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:25:59 UTC
APU Performance Parameters
FIN: 4005KM ** ON A/C NOT FOR ALL
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. 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 31-36-00-740-008-A | Access to the Parameter Call-Up Menus |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| TASK 49-00-00-710-009-A | Self-Test of the ECB |
| TASK 49-00-00-710-010-A | Operational Test of the APU |
| TASK 49-00-00-860-009-A | APU Shutdown by External Power (131-9(A)) |
| TASK 49-00-00-860-009-A-01 | APU Shutdown by Batteries (131-9(A)) |
Correction for LCIT in RTL ConditionSubtask 49-00-00-860-137-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
Subtask 49-00-00-865-135-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
B. Make sure that this(these) circuit breaker(s) is(are) closed:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | APU/FUEL/BLOW OFF/PUMP | 2QC | B14 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/FUEL/BLOW OFF/CTL | 1QC | K39 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/FIRE AND OVHT/DET/LOOP B | 2WG | L44 |
| 121VU | APU/FIRE AND OVHT/DET/LOOP A | 1WG | L43 |
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
| 121VU | APU/FIRE/EXTIG/SQUIB/B | 2WF | L39 |
| 121VU | APU/FIRE/EXTIG/SQUIB/A | 1WF | L38 |
| 121VU | APU/FIRE/LP VALVE/NORM | 4WF | M42 |
| 121VU | APU/FIRE/LP VALVE/STBY | 3WF | M41 |
| 121VU | APU/FUEL/LP VALVE/CTL | 1QF | M40 |
| 121VU | APU/FUEL/LP VALVE/SPLY | 2QF | M39 |
| 121VU | APU/FUEL/PUMP/CTL | 3QC | M38 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/FUEL/BLOW OFF/CTL | 1QC | P38 |
Subtask 49-00-00-710-060-A ** ON A/C NOT FOR ALL
A. APU Performance Test
(1) Read-out the LAST LEG REPORT of the ECB and make sure that there is no fault available.
(2) Do the self test of the ECB (Ref. AMM TASK 49-00-00-710-009). Make sure that no maintenance message is shown.
(3) Start and operate the APU (Ref. AMM TASK 49-00-00-710-010).
(4) On the APU system page of the lower ECAM display unit, read the Exhaust Gas Temperature (EGT) values under the subsequent conditions:
Subtask 49-00-00-720-055-A ** ON A/C NOT FOR ALL (1) Read-out the LAST LEG REPORT of the ECB and make sure that there is no fault available.
(2) Do the self test of the ECB (Ref. AMM TASK 49-00-00-710-009). Make sure that no maintenance message is shown.
(3) Start and operate the APU (Ref. AMM TASK 49-00-00-710-010).
(4) On the APU system page of the lower ECAM display unit, read the Exhaust Gas Temperature (EGT) values under the subsequent conditions:
- EGT in Ready to Load (RTL) mode,
- EGT in Main Engine Start (MES) mode,
NOTE: The aircraft configuration for
.RTL mode:
(5) Read-out the Aircraft Integrated Data System (AIDS) data for the subsequent ALPHA CALL UPs in the TABLE A (Ref. AMM TASK 31-36-00-740-008). .RTL mode:
- APU operates at more than 95% speed,
- the APU BLEED pushbutton switch is in ON position,
- one engine dry motoring.
NOTE: When you enter the ADW ALPHA CODE the APU operating status is shown in binary codes.
ADW ALPHA CODE for SAGEM FDIMU = ADW1
ADW ALPHA CODE for TELEDYNE FDIMU = ADW1ALL1
ADW ALPHA CODE for SAGEM FDIMU = ADW1
ADW ALPHA CODE for TELEDYNE FDIMU = ADW1ALL1
B. APU Performance Parameters
(1) APU Performance Parameter Table
TABLE A
The values in the APU Performance Parameters (Table A) are shown for specific inlet conditions and no generator loading. Because it is unlikely that an APU will meet the exact conditions in the table A, the subsequent correction formulas must be used.
(a) RTL EGTA Correction Formula
5. Close-up(1) APU Performance Parameter Table
NOTE: The performance parameter values and the related ranges are given for information only because there can be a difference between them and those found during APU operation. It is possible for the APU to continue to operate correctly with one or more values different from those given in the table.
| ------------- ALPHA | APU BLEED OFF --------------- RTL (IDLE) | APU BLEED ON ------------ MES | PARAMETER RANGE ---------------- (ALL MODES) |
|---|---|---|---|
| LCIT (deg.C) | 38 | 50 | +/-0.5 |
| P2A (Bar) | 1.013 | 1.013 | +/-0.005 |
| IGV (Deg) | 22 | 92 - 96 | +/-1.0 |
| PT (Bar) | N/A (1) | 3.58 - 3.71 (3) | +/-0.15 |
| WB (Kg/s) | N/A (1) | 0.40 | +/-0.02 |
| EGTA (deg.C) | 380 - 410 (4) - (2) | 490 - 533 (4) - (2) | +/-20.0 |
| NA (%) | 100 | 100 | +/-0.5 |
| GLA (%) | 0 | 0 | +/-1.0 |
| Data Corr | Table 1,2 | Table 2,3 | |
NOTE: For the Table 1
For the Table 2
For the Table 3
For the Table 2
For the Table 3
NOTE: (1) Bleed Air Pressure (PT) and Bleed Air Flow (WB) are meaningless parameters for the RTL mode.
(2) Correct Exhaust Gas Temperature (APU) (EGTA) for Load Compressor Inlet (LCIT) and GLA.
(3) Shown are the deteriated and nominal values. Corrections are necessary for different LCIT and Barometric pressure.
(4) Shown are the deteriated and nominal values. Corrections are necessary for different LCIT, Barometric pressure and GLA.
(2) APU Performance Correction Formulas (2) Correct Exhaust Gas Temperature (APU) (EGTA) for Load Compressor Inlet (LCIT) and GLA.
(3) Shown are the deteriated and nominal values. Corrections are necessary for different LCIT and Barometric pressure.
(4) Shown are the deteriated and nominal values. Corrections are necessary for different LCIT, Barometric pressure and GLA.
The values in the APU Performance Parameters (Table A) are shown for specific inlet conditions and no generator loading. Because it is unlikely that an APU will meet the exact conditions in the table A, the subsequent correction formulas must be used.
(a) RTL EGTA Correction Formula
| ------------------------------------------------------------------------------- |
| ! EGTA (Table A) = EGTA + EGT(GLA) + EGT(LCIT) ! |
| ! (Table A Value = ECAM Value + Value T2 + Value T1) ! |
| ------------------------------------------------------------------------------- |
NOTE: For the Value T1 ==>
For the Value T2 ==>
(b) MES Mode EGTA and PT Correction Formula For the Value T2 ==>
| ------------------------------------------------------------------------------- |
| ! EGTA(Table A) = EGTA + EGT(GLA) + EGT(LCIT) ! |
| ! (Table A Value = ECAM Value + Value T2 + Value T3) ! |
| ------------------------------------------------------------------------------- |
NOTE: For the Value T2 ==>
For the Value T3 ==>
For the Value T3 ==>
| ------------------------------------------------------------------------------- |
| ! (Corrected PT (Table A) = (PT x (1.0132/Barometer)) + PT(LCIT) ! |
| ! (Table A Value = (AIDS Value x (1.0132/Barometer(bar)) + Value T3) ! |
| ------------------------------------------------------------------------------- |
Subtask 49-00-00-860-138-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Stop the APU (Ref. AMM TASK 49-00-00-860-009).
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) Stop the APU (Ref. AMM TASK 49-00-00-860-009).
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).