Wet Motor Procedure (Menu Mode) [CFML]

TASK 73-29-00-740-822-A
Wet Motor Procedure (Menu Mode)

WARNING: MAKE SURE THAT WHEN THE ENGINES OPERATE ON THE GROUND:

NO PERSONS GO WHERE THE AIRCRAFT CAN CAUSE THEM INJURY OR CAN KILL THEM
NO OBJECTS STAY WHERE THE ENGINES CAN BLOW THEM AWAY OR WHERE THEY CAN BE PULLED INTO THE ENGINES BY SUCTION.

WARNING: MAKE SURE THAT ALL ENGINE OPERATING AREAS ARE AS CLEAN AS POSSIBLE. ALL RAMPS, TAXIWAYS, RUNWAYS AND OTHER OPERATING AREAS MUST BE VERY CLEAN TO PREVENT BAD DAMAGE TO THE ENGINE, AIRCRAFT AND PERSONS IN THE AREA.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: DO NOT TOUCH THE PROBES DURING OR IMMEDIATELY AFTER THIS PROCEDURE. THE PROBES WILL BE HOT AND CAN BURN YOU.

WARNING: MAKE SURE THAT THE LANDING GEAR GROUND SAFETIES AND THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

CAUTION: MAKE SURE THAT THERE IS NO HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT WHEN YOU DO THIS PROCEDURE. IF A HYDRAULIC GROUND POWER SUPPLY IS CONNECTED, THERE IS A RISK OF DAMAGE TO THE ENGINE PUMPS.

CAUTION: REMOVE THE PROTECTIVE COVERS FROM THE PROBES BEFORE YOU DO THIS PROCEDURE. IF YOU DO NOT REMOVE THEM, THE PROBES AND PROTECTIVE COVERS CAN BECOME DAMAGED OR BURNED.

ZONE: 400

1. Reason for the Job
This is a wet motoring procedure. The purpose of this function is to help you find leaks and to depreserve the engine if the fuel system of the engine was preserved before.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-805-A	Check of the Oil Level and Replenishing
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 26-12-00-710-002-B	Operational Test of the Engine Fire and Overheat Detection with the Centralized Fault Display System (CFDS)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-12-00-860-805-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-806-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 71-00-00-790-805-A	Fuel or Hydraulic or Oil Leakage Limits
TASK 71-00-00-869-802-A	Wind Limitations During Engine Ground Operations
TASK 71-00-00-869-803-A	Safety Precautions During Engine Ground Operations
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Wet Motor Procedure (Menu Mode)

3. Job Set-up
Subtask 73-29-00-869-069-A

A. Prepare for the Test
(1) On HYD/FUEL panel 40VU:

Push all the FUEL/PUMPS pushbutton switches.
The OFF legends of these pushbutton switches go off.

(2) Make sure that the throttle control lever of the engine 1(2) is in the idle stop position (zero on the graduated sector).
(3) Obey the wind limitations and safety precautions during the engine ground operations (Ref. AMM TASK 71-00-00-869-802) and (Ref. AMM TASK 71-00-00-869-803).
(4) Make sure that the engine inlet and exhaust covers are removed. Make sure that these areas are clear of unwanted objects.
(5) Do a visual check of the fan inlet, temperature sensors and exhaust areas.

NOTE: You must make sure that the engine inlet, inlet lip, fan, spinner and fan exhaust duct are clear of ice or snow. The ice or snow must be melted if the fan does not turn freely.

(6) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, LPT and external surfaces of the cowls.
(7) Do a check of the oil quantity (Ref. AMM TASK 12-13-79-610-805).
(8) Do a check of the drain ports for fuel, oil and hydraulic leaks (Ref. AMM TASK 71-00-00-790-805).

Subtask 73-29-00-941-080-A

B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.

Subtask 73-29-00-010-074-A

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 73-29-00-040-062-A

D. Deactivation of the Thrust Reverser System for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 73-29-00-010-075-A

E. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806)
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 73-29-00-861-089-A

F. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).

Subtask 73-29-00-865-101-A

G. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41

Subtask 73-29-00-865-102-A

H. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42

Subtask 73-29-00-869-070-A

I. Continue to prepare for test

CAUTION: MAKE SURE THAT THE HYDRAULIC RESERVOIR PRESSURE IS IN THE CORRECT OPERATION RANGE BEFORE YOU START THE ENGINE. THE HYDRAULIC FLUID IS NECESSARY TO LUBRICATE THE HYDRAULIC PUMPS THAT THE ENGINE OPERATES.

(1) Supply the aircraft pneumatic system from the HP ground power unit or the APU (Ref. AMM TASK 36-12-00-860-806) and (Ref. AMM TASK 36-12-00-860-805).
(2) On the lower ECAM DU:
(a) Get the HYDRAULIC page.
(b) Make sure that the pressure of the Green reservoir for engine 1 (Yellow reservoir for engine 2) is correct.
(c) Make sure that the reservoir fluid level is correct.
(3) Make sure that the engine 1(2) pump is serviceable (on HYD/FUEL panel 40VU, the OFF legend of the ENG 1(2) PUMP pushbutton switch is off).

Subtask 73-29-00-710-093-A

J. Test
(1) Do the operational test of the engine fire and overheat detection (loop/squib) (Ref. AMM TASK 26-12-00-710-002).

4. Procedure

CAUTION: DO NOT OPERATE THE ENGINE IF THE FUEL INLET PRESSURE IS NOT POSITIVE. THE FUEL IS NECESSARY TO LUBRICATE THE ENGINE FUEL PUMP AND THE HMU AND THUS PREVENT DAMAGE.

CAUTION: MAKE SURE THAT THE ENG/MASTER 1(2) CONTROL SWITCH (ON THE PANEL 115VU) IS SET TO OFF BEFORE YOU START THE FUEL PUMPS.

CAUTION: DO NOT EXCEED THE STARTER DUTY CYCLE. DAMAGE TO THE STARTER CAN OCCUR.

Subtask 73-29-00-710-094-A

A. Do this test:

WARNING: BEFORE YOU START THE ENGINE AFTER A WET MOTORING TEST, DRY MOTOR THE ENGINE FOR TWO MINUTES. A LARGE QUANTITY OF HIGHLY FLAMMABLE FUEL VAPORS COME OUT FROM THE ENGINE DURING THE WET MOTORING AND THERE IS A RISK OF FIRE.

WARNING: MAKE SURE THAT THE AIRCRAFT IS POINTED INTO THE WIND WHEN YOU DO A WET MOTORING TEST. A LARGE QUANTITY OF HIGHLY FLAMMABLE FUEL VAPORS COME OUT FROM THE ENGINE DURING THE WET MOTORING AND THERE IS A RISK OF FIRE.

(1) Make sure the thrust reverser cowls doors are opened.

NOTE: During this test, fuel leak observations that follow can be expected:

Some fuel discharge at the LPT drain
Light fuel leak at the interface between the B-Sump drain line and the engine casing.

NOTE: During the test, obey the instructions shown on the Multipurpose Control and Display unit (MCDU).

NOTE: The Menu Mode wet motoring test is expected to take approximately four minutes to complete.

NOTE: The Electronic Engine Control (EEC) will not enter the menu mode (interactive mode) after an enquire command from the CFDS (Centralized Fault Display System) if one or more of the conditions that follow are set:

N2 more than ten percent or invalid
Rotary selector set on: CRANK or IGN/START or invalid
Manual Start Button set on: ON or invalid
TLA (Throttle Lever Angle) not at idle or invalid
Aircraft in the air
MASTER lever ON or invalid
BITE command code input label invalid.

NOTE: The EEC will abort a running test or special function if one or more of the conditions that follow becomes set:

N2 more than 45 percent or invalid
Engine state not starting or off.
Engine not in default , dry motor, or wet motor start state
Exhaust Gas Temperature (EGT) more than 250 deg.C (482.00 deg.F) or invalid
TLA not at idle or invalid
Aircraft in the air
115 V power available to igniters
N2 drops below 20 percent after going above 20 percent
N2 more than 20 percent for two minutes during crank or start phase
You enter in the interactive mode of the other channel.

ACTION	RESULT
1.On the MCDU, make the selections that follow for the applicable engine: A.On the Engine X Main Menu screen, select the key adjacent to SPECIAL FUNCTIONS.	The SPECIAL FUNCTIONS submenu screen is displayed.
B.On the SPECIAL FUNCTIONS submenu, select the key adjacent to WET MOTOR PROCEDURE. NOTE: If the return key is selected on the MCDU during a running test or special function, the EEC will abort the test. FUNCTION TERMINATED will be shown on the MCDU. You will need to select the return key and restart the test. Pull C/B for IGN 1 and 2	The Wet Motor Procedure Start Screen is displayed (Screen 1).
2.On ENG panel 115VU: Set the ENG/MODE/CRANK/NORM/IGN/START selector switch to CRANK.	On the lower ECAM DU: The ENGINE page comes into view. Make sure that the available air pressure is between 25 psi (1.72 bar) and 55 psi (3.79 bar). Make sure that the quantity of oil in the oil tank of the engine 1(2) is correct.
3.On overhead CTL and IND panel 22VU: Push the ENG/MAN START 1(2) pushbutton switch. NOTE: During cold weather, large oil pressure surges can occur.	The ON legend of this pushbutton switch comes on. On the lower ECAM DU, on the ENGINE page: The symbol for the starter valve is in the open position. NOTE: Make sure that The engine turns. The oil pressure indication is positive. NOTE: While the engine is motoring, do a visual check for leaks at the fuel and oil system tubes and manifolds.
4.When the N2 speed is between 15 and 20 percent, on ENG panel 115VU: Set the ENG/MASTER 1(2) control switch to ON.	On the upper ECAM DU: The fuel flow indication FF increases. On the lower ECAM DU: Make sure that the oil pressure indication is positive.
5.On the MCDU Wet Motor Procedure Start Screen (Screen 1) START THE PROCEDURE.	The WET Motor Procedure progress Screen (Screen 2) is displayed. Pause until fuel mist is observed from the engine exhaust.
6.After fuel mist is observed, on ENG panel 115VU: Set the ENG/MASTER 1(2) control switch to OFF.	On the lower ECAM DU: The symbol for the starter valve is in the closed position after the reset of the EEC. NOTE: After the reset of the EEC, the EEC will command the starter valve to open when the core speed is ten percent and the engine will begin dry-motoring.
7.Continue with the dry-motoring of the engine for 60 seconds.	This will dry the fuel that can be in the combustor.
8.After 60 seconds of dry-motoring, on overhead CTL and IND panel 22VU: On the MCDU: Select RETURN. Release the ENG/MASTER 1(2) pushbutton switch. Listen for unusual noise from the engine during coast down.	The ON legend of this pushbutton switch goes off. Wet Motor Procedure Complete (Screen 5) is displayed. On the lower ECAM DU: The symbol for the starter valve is in the closed position. The engine motoring stops and the engine the coast down begins. NOTE: Gear noise and seal rubs are normal noise.
9.On HYD/FUEL panel 40VU: Release all the FUEL/PUMPS pushbutton switches.	The OFF legends of these pushbutton switches come on.
10.On ENG panel 115VU: Set the ENG/MODE/CRANCK/NORM/IGN/START selector switch to NORM.	On the lower ECAM DU: The ENGINE page goes out of view.
11.On the ECAM control panel: Get the ENGINE page.	On the lower ECAM DU: The ENGINE page comes into view.
12.On the WET MOTOR PROCEDURE screen: Select: RETURN	The Special Functions main screen is shown.
13.On the Special Functions main screen: Select RETURN.	The MCDU home page comes into view.

Subtask 73-29-00-210-052-A

B. Do a general visual inspection:
(1) Do a check of the engine oil level and service as necessary.
(2) Do an inspection of the fuel nozzles and manifold for leaks.
(3) Do an inspection of the fuel and oil lines, fittings and components for leaks.
(4) Do an inspection of the fan inlet and turbine exhaust for unusual conditions.

5. Close-up
Subtask 73-29-00-869-072-A

A. Put the aircraft back to its initial configuration.
(1) Stop the pneumatic supply to the aircraft (Ref. AMM TASK 36-12-00-860-806) and (Ref. AMM TASK 36-12-00-860-805) and do as follows:
(a) Disconnect the HP ground power unit or stop the APU.
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 73-29-00-865-103-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42

Subtask 73-29-00-410-077-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806).
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 73-29-00-440-061-A

D. Do the reactivation of the thrust reverser after ground maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 73-29-00-410-078-A

E. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 73-29-00-862-087-A

F. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 13:03:33 UTC