DOC AIRBUS | TSM A320FSlow Acceleration to Idle on Engine 1 or 2
TASK 73-00-00-810-867-A
Slow Acceleration to Idle on Engine 1 or 2
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 73-00-00-710-180-A ** ON A/C NOT FOR ALL
Subtask 73-00-00-810-116-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:11 UTC
Slow Acceleration to Idle on Engine 1 or 2
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 36-11-00-810-829-A | Loss of the Non-Return Function and Temperature Limitation Function of the Bleed Pressure-Regulator Valve of the Engine 1 |
| TSM TASK 36-11-00-810-830-A | Loss of the Non-Return Function and Temperature Limitation Function of the Bleed Pressure-Regulator Valve of the Engine 2 |
| AMM 28-24-00-710-002 | Operational Test of the ENG 1(2) LP Fuel Valve |
| AMM 28-24-00-720-001 | Functional Test of the LP Fuel Shut Off Valves |
| AMM 71-00-00-710-006 | Minimum Idle Check |
| AMM 71-00-00-710-010 | Accel Check |
| AMM 71-00-00-710-025 | Accel Check |
| AMM 72-21-00-210-001 | Inspection/Check of the Spinner Cone |
| AMM 72-21-00-210-006 | Inspection of Fan Rotor Blades Removed from the Fan Disk. |
| AMM 72-21-00-290-002 | Complementary (and optional) Borescope Inspection of the Booster Stage 4 Rotor Blade Tips Through One VBV Cavity. |
| AMM 72-21-00-290-003 | Borescope Inspection of the Booster Rotor Blades, Stages 2, 3, 4 and 5 through the Booster Inlet and Borescope Ports SO3 and SO5 |
| AMM 72-31-00-290-001 | Inspection of the High Pressure Compressor Rotor Assembly |
| AMM 72-31-00-290-002 | Inspection of the High Pressure Compressor Rotor Assembly |
| AMM 72-41-00-290-001 | Borescope Inspection of the Combustion Chamber Liners, Dome Areas, HPT Nozzle Vanes and Shrouds (as far as visible through two opposite ports) |
| AMM 72-51-00-290-002 | Borescope Inspection of the High-Pressure Turbine-Nozzle Assembly |
| AMM 72-51-00-290-004 | Borescope Inspection of High-Pressure Turbine Nozzle Assembly |
| AMM 72-54-00-210-002 | Inspection of the Turbine Case |
| AMM 72-54-00-210-005 | Inspection of the Turbine Case |
| AMM 72-54-00-290-001 | Inspection of the Stage 1-3 Blades |
| AMM 72-54-00-290-002 | Inspection of the Stage 4 Blades |
| AMM 72-54-00-290-003 | Inspection of the Stage 2-4 Nozzle Segments |
| AMM 72-54-00-290-004 | Inspection of the Stage 1-4 Stationary Air Seals |
| AMM 72-54-00-290-005 | Inspection of the Stage 1-3 Blades |
| AMM 72-54-00-290-006 | Inspection of the Stage 4 Blades |
| AMM 72-54-00-290-007 | Inspection of the Stage 2-4 Nozzle Segments |
| AMM 72-54-00-290-008 | Inspection of the Stage 1-4 Stationary Air Seals |
| AMM 73-11-10-000-001 | Removal of the Fuel Pump and Filter Assembly |
| AMM 73-11-10-000-003 | Removal of the Fuel Pump and Filter Assembly |
| AMM 73-11-10-400-001 | Installation of the Fuel Pump and Filter Assembly |
| AMM 73-11-10-400-003 | Installation of the Fuel Pump and Filter Assembly |
| AMM 73-21-10-000-001 | Removal of the Hydromechanical Unit (HMU) |
| AMM 73-21-10-000-002 | Removal of the Hydromechanical Unit (HMU) |
| AMM 73-21-10-400-001 | Installation of the Hydromechanical Unit (HMU) |
| AMM 73-21-10-400-002 | Installation of the Hydromechanical Unit (HMU) |
| AMM 73-29-00-710-040 | Operational Test of the FADEC on the ground (with Engine Motoring) |
| AMM 75-31-00-210-001 | Visual Inspection of the Variable Bleed Valve (VBV) System |
| AMM 75-31-00-210-002 | Visual Inspection of the Variable Bleed Valve (VBV) System |
Subtask 73-00-00-710-180-A ** ON A/C NOT FOR ALL
A. Not applicable, the fault is evident.
4. Fault IsolationSubtask 73-00-00-810-116-A ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the crew observation: slow acceleration to idle after light off:
(1) Do a check of the engine inlet and exhaust areas for damage.
(2) In case of acceleration problem from idle, do an acceleration check to confirm the fault AMM 71-00-00-710-010.
(3) Do a check for aircraft bleed system malfunction (pack valve/engine air intake anti-ice/wing anti-ice/bleed leakage).
(4) Do a check of the PS3 line to make sure that there is no blockage or leakage.
(5) Do an operational test of the FADEC on the ground (with engine motoring) to do a check of the VSV/VBV position AMM 73-29-00-710-040.
(6) Do a visual inspection of the VBV system AMM 75-31-00-210-001.
(7) Troubleshoot as per (Ref. TSM TASK 36-11-00-810-829) and (Ref. TSM TASK 36-11-00-810-830) to check 10HA1, 10HA2 and 4001HA1, 4001HA2.
(8) Replace the fuel pump AMM 73-11-10-000-001 and AMM 73-11-10-400-001.
(9) Do a check of the LP fuel valve for malfunction AMM 28-24-00-710-002 and AMM 28-24-00-720-001.
(10) Replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-001 and AMM 73-21-10-400-001.
(11) Do a borescope inspection of the fan and booster assembly AMM 72-21-00-210-001 and AMM 72-21-00-290-002.
(12) Do a borescope inspection of the high pressure compressor rotor assembly AMM 72-31-00-290-001.
(13) Do a borescope inspection of the combustion chambers AMM 72-41-00-290-001.
(14) Do a borescope inspection of the high-pressure turbine-nozzle assembly AMM 72-51-00-290-002.
(15) Do a borescope inspection of the low pressure turbine AMM 72-54-00-290-001 and AMM 72-54-00-290-002 and AMM 72-54-00-290-003 and AMM 72-54-00-290-004 and AMM 72-54-00-210-002.
Subtask 73-00-00-810-116-B ** ON A/C NOT FOR ALL (1) Do a check of the engine inlet and exhaust areas for damage.
(2) In case of acceleration problem from idle, do an acceleration check to confirm the fault AMM 71-00-00-710-010.
(3) Do a check for aircraft bleed system malfunction (pack valve/engine air intake anti-ice/wing anti-ice/bleed leakage).
(4) Do a check of the PS3 line to make sure that there is no blockage or leakage.
(5) Do an operational test of the FADEC on the ground (with engine motoring) to do a check of the VSV/VBV position AMM 73-29-00-710-040.
(6) Do a visual inspection of the VBV system AMM 75-31-00-210-001.
(7) Troubleshoot as per (Ref. TSM TASK 36-11-00-810-829) and (Ref. TSM TASK 36-11-00-810-830) to check 10HA1, 10HA2 and 4001HA1, 4001HA2.
(8) Replace the fuel pump AMM 73-11-10-000-001 and AMM 73-11-10-400-001.
(9) Do a check of the LP fuel valve for malfunction AMM 28-24-00-710-002 and AMM 28-24-00-720-001.
(10) Replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-001 and AMM 73-21-10-400-001.
(11) Do a borescope inspection of the fan and booster assembly AMM 72-21-00-210-001 and AMM 72-21-00-290-002.
(12) Do a borescope inspection of the high pressure compressor rotor assembly AMM 72-31-00-290-001.
(13) Do a borescope inspection of the combustion chambers AMM 72-41-00-290-001.
(14) Do a borescope inspection of the high-pressure turbine-nozzle assembly AMM 72-51-00-290-002.
(15) Do a borescope inspection of the low pressure turbine AMM 72-54-00-290-001 and AMM 72-54-00-290-002 and AMM 72-54-00-290-003 and AMM 72-54-00-290-004 and AMM 72-54-00-210-002.
A. If the fault symptom is identified by the crew observation: slow acceleration to idle after light off:
(1) Do a check of the engine inlet and exhaust areas for damage.
(2) In case of acceleration problem from idle, do an acceleration check to confirm the fault AMM 71-00-00-710-025.
(3) Do a check for aircraft bleed system malfunction (pack valve/engine air intake anti-ice/wing anti-ice/bleed leakage).
(4) Do a check of the PS3 line to make sure that there is no blockage or leakage.
(5) Do an operational test of the FADEC on the ground (with engine motoring) to do a check of the VSV/VBV position AMM 73-29-00-710-040.
(6) Do a visual inspection of the VBV system AMM 75-31-00-210-002.
(7) Troubleshoot as per (Ref. TSM TASK 36-11-00-810-829) and (Ref. TSM TASK 36-11-00-810-830) to check 10HA1, 10HA2 and 4001HA1, 4001HA2.
(8) Replace the fuel pump AMM 73-11-10-000-003 and AMM 73-11-10-400-003.
(9) Do a check of the LP fuel valve for malfunction AMM 28-24-00-710-002 and AMM 28-24-00-720-001.
(10) Replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-002 and AMM 73-21-10-400-002.
(11) Do a borescope inspection of the fan and booster assembly AMM 72-21-00-210-006 and AMM 72-21-00-290-003.
(12) Do a borescope inspection of the high pressure compressor rotor assembly AMM 72-31-00-290-002.
(13) Do a borescope inspection of the combustion chambers AMM 72-41-00-290-001.
(14) Do a borescope inspection of the high-pressure turbine-nozzle assembly AMM 72-51-00-290-004.
(15) Do a borescope inspection of the low pressure turbine AMM 72-54-00-290-005 and AMM 72-54-00-290-006 and AMM 72-54-00-290-007 and AMM 72-54-00-290-008 and AMM 72-54-00-210-005.
Subtask 73-00-00-710-181-A ** ON A/C NOT FOR ALL (1) Do a check of the engine inlet and exhaust areas for damage.
(2) In case of acceleration problem from idle, do an acceleration check to confirm the fault AMM 71-00-00-710-025.
(3) Do a check for aircraft bleed system malfunction (pack valve/engine air intake anti-ice/wing anti-ice/bleed leakage).
(4) Do a check of the PS3 line to make sure that there is no blockage or leakage.
(5) Do an operational test of the FADEC on the ground (with engine motoring) to do a check of the VSV/VBV position AMM 73-29-00-710-040.
(6) Do a visual inspection of the VBV system AMM 75-31-00-210-002.
(7) Troubleshoot as per (Ref. TSM TASK 36-11-00-810-829) and (Ref. TSM TASK 36-11-00-810-830) to check 10HA1, 10HA2 and 4001HA1, 4001HA2.
(8) Replace the fuel pump AMM 73-11-10-000-003 and AMM 73-11-10-400-003.
(9) Do a check of the LP fuel valve for malfunction AMM 28-24-00-710-002 and AMM 28-24-00-720-001.
(10) Replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-002 and AMM 73-21-10-400-002.
(11) Do a borescope inspection of the fan and booster assembly AMM 72-21-00-210-006 and AMM 72-21-00-290-003.
(12) Do a borescope inspection of the high pressure compressor rotor assembly AMM 72-31-00-290-002.
(13) Do a borescope inspection of the combustion chambers AMM 72-41-00-290-001.
(14) Do a borescope inspection of the high-pressure turbine-nozzle assembly AMM 72-51-00-290-004.
(15) Do a borescope inspection of the low pressure turbine AMM 72-54-00-290-005 and AMM 72-54-00-290-006 and AMM 72-54-00-290-007 and AMM 72-54-00-290-008 and AMM 72-54-00-210-005.