Stall of the Engine 1 or 2

TASK 80-00-00-810-833-A
Stall of the Engine 1 or 2

1. Possible Causes

tail wind conditions and/or high altitude airport
N2 SNSR
PS3
VSV
T25
HMU-1 [4000KC1]
HMU-2 [4000KC2]
ECU [4000KS]
fuel pump

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 36-11-00-810-813-A	Loss of Automatic Electrical Closure for the Bleed Pressure Regulator Valve on Engine 1
TSM TASK 36-11-00-810-814-A	Loss of Automatic Electrical Closure for the Bleed Pressure Regulator Valve on Engine 2
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
TSM TASK 70-00-00-810-801-A	Engine Failure(s)
AMM 71-00-00-710-006	Minimum Idle Check
AMM 72-00-00-200-003	Procedure After the Engine has Exceeded the Operational Limits
AMM 72-00-00-200-008	Inspection/Check After the Engine has Exceeded the Operational Limits
AMM 72-32-00-200-001	Inspection/Check of the HPC Front Stator Assembly
AMM 72-32-00-210-002	Inspection/Check of the HPC Front Stator Assembly
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 73-21-60-000-001	Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001	Installation of the Electronic Control Unit (ECU)
AMM 73-21-60-740-001	Read the CLASS 3 REPORT
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 80-00-00-710-117-A ** ON A/C NOT FOR ALL

A. Test
(1) Not applicable, the confirmation can cause damage to the engine.

4. Fault Isolation
Subtask 80-00-00-810-192-A ** ON A/C NOT FOR ALL

A. If the following failure message is displayed in the post-flight report:
(1) PRESS REG-V 4001HA1 OR 10HA1 is displayed:

Do the troubleshooting procedure (Ref. TSM TASK 36-11-00-810-813).

(2) PRESS REG-V 4001HA2 OR 10HA2 is displayed:

Do the troubleshooting procedure (Ref. TSM TASK 36-11-00-810-814).

Subtask 80-00-00-810-094-A ** ON A/C NOT FOR ALL

B. This warning is set if a stall condition is detected by the ECU before the engine N2 speed reaches 58 per cent.
This warning may be caused by tail wind conditions and/or high altitude airport.
(1) If this was the case, an engine restart attempt should be carried out in automatic mode.

if an engine restart attempt was successful, no additional maintenance action is required.

(2) If trouble duplicates:

do not interrupt the start sequence and leave the ECU authority for 2 additional start attempts (follow ECAM procedure).

(3) Consider pointing A/C into the wind for engine start if possible.
If above conditions do not apply:

do a FADEC non motoring test AMM 73-29-00-710-040.

(a) Look for failure messages including the following words in FADEC test results and FADEC scheduled maintenance report AMM 73-21-60-740-007: N2 SNSR , PS3 , VSV , T25 .
1 If any of those messages is present:

do the troubleshooting procedure (Ref. TSM TASK 70-00-00-810-801).

2 If no message is found:

do the engine post stall inspection AMM 72-00-00-200-003.

(4) Do a detailed visual inspection of the VSV control linkage AMM 72-32-00-200-001 and look for any broken or loose components:

repair or replace as required.

(5) If nothing is found:

replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-001 and AMM 73-21-10-400-001.

(6) If trouble repeats:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

(7) If nothing is found:

replace the fuel pump AMM 73-11-10-000-001 and AMM 73-11-10-400-001.

Subtask 80-00-00-810-094-C ** ON A/C NOT FOR ALL

if an engine restart attempt was successful, no additional maintenance action is required.

(2) If trouble duplicates:

do not interrupt the start sequence and leave the ECU authority for 2 additional start attempts (follow ECAM procedure).

(3) Consider different A/C heading for engine start if possible.
If above conditions do not apply:

do a FADEC non motoring test AMM 73-29-00-710-040.

(a) Look for failure messages including the following words in FADEC test results and class 3 report AMM 73-21-60-740-026 : N2 SNSR , PS3 , VSV , T25 .
1 If any of those messages is present:

do the trouble shooting procedure (Ref. TSM TASK 70-00-00-810-801).

2 If no message is found:

do the engine post stall inspection AMM 72-00-00-200-008.

(4) Do a detailed visual inspection of the HPC Front Stator Assembly AMM 72-32-00-210-002 and look for any broken or loose components:

repair or replace as required.

(5) If nothing is found:

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.

(6) If nothing is found:

replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-002 and AMM 73-21-10-400-002.

(7) If trouble repeats:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

(8) If nothing is found:

replace the fuel pump AMM 73-11-10-000-003 and AMM 73-11-10-400-003.

Subtask 80-00-00-810-094-D ** ON A/C NOT FOR ALL

if an engine restart attempt was successful, no additional maintenance action is required.

(2) If trouble duplicates:

do not interrupt the start sequence and leave the ECU authority for 2 additional start attempts (follow ECAM procedure).

(3) Consider pointing A/C into the wind for engine start if possible.
If above conditions do not apply:

do a FADEC non motoring test AMM 73-29-00-710-040.

(a) Look for failure messages including the following words in FADEC test results and FADEC scheduled maintenance report AMM 73-21-60-740-007 and class 3 report AMM 73-21-60-740-001: N2 SNSR , PS3 , VSV , T25 .
1 If any of those messages is present:

do the troubleshooting procedure (Ref. TSM TASK 70-00-00-810-801).

2 If no message is found:

do the engine post stall inspection AMM 72-00-00-200-003.

(4) Do a detailed visual inspection of the VSV control linkage AMM 72-32-00-200-001 and look for any broken or loose components:

repair or replace as required.

(5) If nothing is found:

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.

(6) If nothing is found:

replace the HMU-1 [4000KC1] ( HMU-2 [4000KC2] ) AMM 73-21-10-000-001 and AMM 73-21-10-400-001.

(7) If trouble repeats:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

(8) If nothing is found:

replace the fuel pump AMM 73-11-10-000-001 and AMM 73-11-10-400-001.

Subtask 80-00-00-710-118-A ** ON A/C NOT FOR ALL

C. Do a minimum idle check to make sure that all engine instruments give the correct indication AMM 71-00-00-710-006.

[Rev.8 from Aug 2018] 2026.04.04 04:38:37 UTC