W DOC AIRBUS | TSM A320F

The Engine is Slow to Accelerate

TASK 71-00-00-810-807-A
The Engine is Slow to Accelerate

1. Possible Causes
  • PS3 Sense Line
  • HP Bleed Valve
  • Pressure Regulating Valve
  • Wing anti-ice valve
  • Nacelle anti-ice
  • Air conditionning system
  • IP check valve
  • HMU
  • ECU [4000KS]
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 36-11-00-710-001
Operational Test to read the CURRENT STATUS of the Engine Bleed Air System
AMM 36-11-41-200-001
Check of the IP Bleed Check Valve for Condition
AMM 36-11-49-200-041
Visual Inspection of the Pneumatic System Hoses, Tubes and Ducts
AMM 71-00-00-710-010
Accel Check
AMM 71-00-00-710-025
Accel Check
AMM 72-00-00-200-026
Inspection/Check of the PS3 Line
AMM 72-00-00-200-029
Inspection/Check of the PS3 Line
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 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 73-21-60-000-001
Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001
Installation of the Electronic Control Unit (ECU)
AMM 73-21-60-740-007
Correct Time Limited Faults (Non Asterisked) of the Engine Scheduled Maintenance Report
AMM 73-21-60-740-026
Read the CLASS 3 REPORT
AMM 73-29-00-710-040
Operational Test of the FADEC on the ground (with Engine Motoring)
3. Fault Confirmation
Subtask 71-00-00-710-058-A ** ON A/C NOT FOR ALL
A. test
   (1) Do the "ACCEL CHECK" AMM 71-00-00-710-010
NOTE: Slow acceleration is most likely to occur during power up for take off between min idle and N1=50 percent.
   (2) If the Accel Chek is within the limits and the fault is still reported during subsequent flights, following trouble shooting is to be done at first opportunity without interfering with Revenue Service Operation.
   (3) If the Accel Chek is not within the limits, following trouble shooting is to be done prior to next flight.
Subtask 71-00-00-710-058-B ** ON A/C NOT FOR ALL
A. test
   (1) Do the "ACCEL CHECK" AMM 71-00-00-710-025
NOTE: Slow acceleration is most likely to occur during power up for take off between min idle and N1=50 percent.
   (2) If the Accel Chek is within the limits and the fault is still reported during subsequent flights, following trouble shooting is to be done at first opportunity without interfering with Revenue Service Operation.
   (3) If the Accel Chek is not within the limits, following trouble shooting is to be done prior to next flight.
4. Fault Isolation
Subtask 71-00-00-810-056-A ** ON A/C NOT FOR ALL
A. Do this procedure.
   (1) Do a check of the Post Flight Report (PFR), the FADEC Last Leg Report and of the Schedule Maintenance Report (SRM) or Class 3 Report AMM 73-21-60-740-007 for PS3, ECU, HMU, FMV, VSV failure messages. Do the trouble shooting related to the failure message(s) if present.
   (2) If no failure message is found, do the following trouble shooting:
  • Do a check of the PS3 Sense Line for blockage or leakage AMM 72-00-00-200-029
  • If nothing is found:
  • If available, do a check of the DMU take-off report of the last leg to determine the level of bleed output taken on each engine. Check line C1 of the DMU report ACCS SD/313600 (STANDARD HEADERS FOR PRINT REPORTS for details)
  • If no DMU report is available do a test to read the current engine status of the bleed air system AMM 36-11-00-710-001.
  • If the bleed output recorded either on the DMU report or in the bleed air system is not the same for each engine:
  • check that there are no fault affectting the engine HP Bleed Valve or Pressure Regulating Valve . Correct as necessary per applicable TSM.
  • 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.
  • check that there are no fault affectting the Wing anti-ice valve or Nacelle anti-ice . Correct as necessary per applicable TSM.
  • check that there are no fault affectting the Air conditionning system (Air cycle machine, pack flow valve control, zone controller). Correct as necessary per applicable TSM.
  • If nothing is found:
   (3) Inspect the IP check valve for condition or sticky flappers AMM 36-11-41-200-001
     (a) If damage is found:
  • repair as necessary
     (b) If nothing is found, continue the trouble shooting as follows.
   (4) Do a visual check of the VSV linkage and look for any loose parts at VSV actuator bellcrank or rings mechanical corrections.
     (a) If damage is found:
  • repair as necessary
     (b) If nothing is found:
       1 If the fault continues during subsequent flights:
         a If the fault continue during subsequent flights:
Subtask 71-00-00-810-056-B ** ON A/C NOT FOR ALL
A. Do this procedure.
   (1) Do a check of the Post Flight Report (PFR), the FADEC Last Leg Report and of the Schedule Maintenance Report (SRM) or Class 3 Report AMM 73-21-60-740-026 for PS3, ECU, HMU, FMV, VSV failure messages. Do the trouble shooting related to the failure message(s) if present.
   (2) If no failure message is found, do the following trouble shooting:
  • Do a check of the PS3 Sense Line for blockage or leakage AMM 72-00-00-200-026
  • If nothing is found:
  • If available, do a check of the DMU take-off report of the last leg to determine the level of bleed output taken on each engine. Check line C1 of the DMU report ACCS SD/313600 (STANDARD HEADERS FOR PRINT REPORTS for details)
  • If no DMU report is available do a test to read the current engine status of the bleed air system AMM 36-11-00-710-001.
  • If the bleed output recorded either on the DMU report or in the bleed air system is not the same for each engine:
  • check that there are no fault affectting the engine HP Bleed Valve or Pressure Regulating Valve . Correct as necessary per applicable TSM.
  • 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.
  • check that there are no fault affectting the Wing anti-ice valve or Nacelle anti-ice . Correct as necessary per applicable TSM.
  • check that there are no fault affectting the Air conditionning system (Air cycle machine, pack flow valve control, zone controller). Correct as necessary per applicable TSM.
  • If nothing is found:
   (3) Inspect the IP check valve for condition or sticky flappers AMM 36-11-41-200-001
     (a) If damage is found:
  • repair as necessary
     (b) If nothing is found, continue the trouble shooting as follows.
   (4) Do a visual check of the VSV linkage and look for any loose parts at VSV actuator bellcrank or rings mechanical corrections.
     (a) If damage is found:
  • repair as necessary
     (b) If nothing is found:
       1 If the fault continues during subsequent flights:
         a If the fault continue during subsequent flights:
5. Close-up
Subtask 71-00-00-710-059-A ** ON A/C NOT FOR ALL
A. Test.
   (1) If the test made in Para. 3. A. was found within the limits:
   (2) If the test made in Para. 3. A. was not found within the limits:
     (a) If the fault is not confirmed:
  • no maintenance action is required.
     (b) If the fault continues:
  • repeat the fault isolation procedure.
Subtask 71-00-00-710-059-B ** ON A/C NOT FOR ALL
A. Test.
   (1) If the test made in Para. 3. A. was found within the limits:
   (2) If the test made in Para. 3. A. was not found within the limits:
     (a) If the fault is not confirmed:
  • no maintenance action is required.
     (b) If the fault continues:
  • repeat the fault isolation procedure.
[Rev.8 from Aug 2018] 2026.04.04 04:34:56 UTC
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