Stall of the engine 1 or 2 / Audible stall / ENGX STALL ECAM

TASK 73-00-00-810-866-A
Stall of the engine 1 or 2 / Audible stall / ENGX STALL ECAM

1. Possible Causes

engine
VSV
T12
T25
PS3
VBV
RACSB
IP check valve
HMU
ECU
TBV
NACTB
IP Check Valve
T25 Sensor

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
TSM TASK 70-00-00-810-801-A	Engine Failure(s)
TSM TASK 73-20-00-810-857-A	Loss of T25 Sensor Signal through the Two Channels on Engine 1
TSM TASK 73-20-00-810-858-A	Loss of T25 Sensor Signal through the Two Channels on Engine 2
TSM TASK 80-00-00-810-833-A	Stall of the Engine 1 or 2
AMM 36-11-41-200-001	Check of the IP Bleed Check Valve for Condition
AMM 71-00-00-710-008	Power Assurance Check
AMM 72-00-00-100-026	Washing of the Engine Gas Path with Pure Water
AMM 72-00-00-200-001	Inspection/Check of Foreign Object Damage (FOD) (Bird Strike Included)
AMM 72-00-00-200-006	Inspection/Check of Foreign Object Damage (FOD) (Bird Strike Included)
AMM 72-21-00-290-001	Standard Borescope Inspection of Booster Rotor Blades, Stages 2, 3 and 4 through the Booster Inlet and Borescope Port SO
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 72-52-00-290-001	Borescope Inspection of HPT Blades (from the front and the rear)
AMM 72-54-00-290-001	Inspection of the Stage 1-3 Blades
AMM 72-54-00-290-005	Inspection of the Stage 1-3 Blades
AMM 73-21-10-000-001	Removal of the Hydromechanical Unit (HMU)
AMM 73-21-10-400-001	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 73-21-60-740-028	Correct Faults of the Engine Scheduled Maintenance Report (SMR)
AMM 79-00-00-281-002	Check of the Electrical Master Chip Detector (EMCD) for Particles
AMM 79-21-10-210-002	Check of the Lubrication Unit Magnetic Plugs and Scavenge Screens

3. Fault Confirmation
Subtask 73-00-00-710-178-A ** ON A/C NOT FOR ALL

A. Not applicable, the confirmation may cause damage to the engine.

4. Fault Isolation
Subtask 73-00-00-810-115-A ** ON A/C NOT FOR ALL

A. Following trouble shooting procedure should be carried out if crew reported audible engine stall while no ECAM warning ENG 1(2) STALL was set. This procedure covers engine stall conditions that occurred at N2 speed at or above idle. For engine stall during start, refer to (Ref. TSM TASK 80-00-00-810-833).

NOTE: Specific trouble shooting is required whether the stall occurred during an accel or decel, the engine fully recovered or not after the stall(s) with no noticeable parameter shift.

(1) If the engine stall during taxi or during descent (on throttle reduction) or during an accel with recovery of engine parameters to normal:
(a) Do a check of the engine for Foreign Object Damage (FOD) or bird strike AMM 72-00-00-200-001.
(b) Check the Post Flight Report of the leg corresponding to the stall occurance and FADEC Scheduled Maintenance Report AMM 73-21-60-740-007 for failure messages including the following words: VSV , T12 , T25 , PS3 , HMU (FMV) VBV , RACSB from the day the stall occured.
(c) If one of those messages is present:

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

(d) If none of those messages is present:

Do a visual check of the VSV cinematic system (actuators linkage, bolting, bellcranks, etc)

(e) If nothing is found:

remove and check the IP check valve for correct condition and operation AMM 36-11-41-200-001.

(f) If nothing is found:

Troubleshoot as per (Ref. TSM TASK 36-11-00-810-829) or (Ref. TSM TASK 36-11-00-810-830) to check 10HA1, 10HA2 and 4001HA1, 4001HA2.

(g) If the IP check valve is not faulty:

replace the HMU AMM 73-21-10-000-001 and AMM 73-21-10-400-001.

(h) If the fault continues:

replace the ECU AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

(i) Do a Power Assurance Check AMM 71-00-00-710-008.
(2) If the engine stalled during an accel with no recovery or with recovery but abnormal engine parameters for the remaining of the flight:
(a) Do a check of the engine for Foreign Object Damage (FOD) or bird strike AMM 72-00-00-200-001.
(b) Do a check of the engine exhaust and stage 4 LPT blades for metallic debris presence.
(c) do an inspection of the magnetic chip detectors AMM 79-21-10-210-002,
(d) Do a borescope inspection of the stage 4 booster blades (borescope port S0) AMM 72-21-00-290-001 and stage 1, 3, 8 HP Compressor blades (borescope ports S1, S3, S8) AMM 72-31-00-290-001
(e) Do a borescope inspection of the HPT blades and stage 1 LPT blades (borescope port S17) AMM 72-52-00-290-001 and AMM 72-54-00-290-001.
(f) If nothing is found:

Check the Post Flight Report of the leg corresponding to the stall occurance and FADEC Scheduled Maintenance Report AMM 73-21-60-740-007 for failure messages including the following words: VSV , T12 , T25 , PS3 , HMU (FMV) from the day the stall occured.

(g) If one of those messages is present:

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

(h) If none of those messages is present:

Do a visual check of the VSV cinematic system (actuators linkage, bolting, bellcranks, etc)

(i) Do a Power Assurance Check AMM 71-00-00-710-008.

Subtask 73-00-00-810-115-B ** ON A/C NOT FOR ALL

A. Do the following Trouble Shooting

SB CFM 72-0391

(1) If engine is affected by SB CFM 72-0391, do a borescope inspection of the stage 5 booster blades (borescope port S05) AMM 72-21-00-290-003 at first maintenance opportunity within 25 hours or 10 cycles (whichever comes first), then proceed with the following procedure.

END OF SB CFM 72-0391

(2) Following trouble shooting procedure should be carried out for cases as defined in the title and for cases if crew reported audible engine stall while no ECAM warning ENG 1(2) STALL was set. This procedure covers stall conditions that occured at N2 speed at or above idle. For engine stall during start, refer to (Ref. TSM TASK 80-00-00-810-833).
(a) Do a check of the engine for Foreign Object Damage (FOD) or bird strike AMM 72-00-00-200-006.
1 Include blacklight inspection of engine fan face to show a hit from a soft body.
(b) Do a check of the Engine Exhaust and Stage 4 LPT Blades for metallic debris presence.
(c) Do an inspection of the Electrical Master Chip Detectors (EMCD) AMM 79-00-00-281-002.
(d) Do a borescope inspection of the Stage 4 Booster Blades (borescope port S0) AMM 72-21-00-290-003.
(e) Do an inspection of the High Pressure Compressor Rotor Assembly AMM 72-31-00-290-002.
(f) Do a borescope inspection of the HPT Blades AMM 72-52-00-290-001 and Stage 1 LPT Blades AMM 72-54-00-290-005.
(g) If nothing is found:
Check the Post Flight Report of the leg corresponding to the stall occurrence and FADEC Scheduled Maintenance Report AMM 73-21-60-740-028 for failure messages including the following words: VSV , T12 , T25 , PS3 , HMU (FMV) VBV , RACSB or TBV or NACTB from the day the stall occurred.
(h) If one of those messages is present:
1 Do the applicable trouble shooting procedure (Ref. TSM TASK 70-00-00-810-801).
(i) If none of those messages are present:
1 Actuate the VSV system to the full open position to check that the system operates smoothly without any binding per AMM 72-31-00-290-002.
2 If nothing is found:

Remove and check the IP Check Valve for correct condition and operation AMM 36-11-41-200-001.

3 If the IP check valve is not faulty:

Troubleshoot as per (Ref. TSM TASK 36-11-00-810-829) or (Ref. TSM TASK 36-11-00-810-830) to check 10HA1, 10HA2 and 4001HA1, 4001HA2.

4 If nothing is found:

Do an inspection check of the T25 Sensor (Ref. TSM TASK 73-20-00-810-857) for engine 1 or (Ref. TSM TASK 73-20-00-810-858) for engine 2.

5 If the T25 Sensor is not faulty:

For CFM56-5B or CFM56-5B/2P if nothing is found, remove engine and send it to the shop for full performance overhaul.
For CFM56-5B/P or CFM56-5B/3:

a If CFM SB 73-0229 or later (ECU software) is installed, remove engine for full performance overhaul.
b If CFM SB 73-0268 is not installed,

Incorporate CFM SB 73-0268.
Perform engine gas path washing with pure water at next maintenance opportunity AMM 72-00-00-100-026.

[Rev.8 from Aug 2018] 2026.04.04 04:38:45 UTC