Wet-Motoring Check [CFML]

TASK 71-00-00-700-804-A
Wet-Motoring Check

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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: DO NOT TRY TO STOP THE FAN FROM TURNING BY HAND. THIS CAN CAUSE INJURY TO THE PERSONS AND DAMAGE TO THE EQUIPMENT.

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

WARNING: DO NOT PERFORM WET-MOTORING IN A HANGAR OR IN A CLOSED AREA. A LARGE QUANTITY OF HIGHLY FLAMMABLE FUEL VAPORS COME OUT FROM THE ENGINE DURING THIS PROCEDURE AND THERE IS A RISK OF FIRE.

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.

CAUTION: - SEE THE APPLICABLE FIGURE FOR WIND LIMIT RESTRICTIONS WHEN THE ENGINE OPERATES.

NATURAL WINDS AND IRREGULAR FORCES FROM SUDDEN GUSTS INCREASE THE DANGEROUS AREA.
DO NOT GO ABOVE OPEN COWLING LIMITATIONS WHEN YOU DO THE TESTS.
THE OPERATOR MUST FULLY KNOW ALL THE OPERATING LIMITS AND PROCEDURES BEFORE THE ENGINE OPERATES.

CAUTION: DO NOT REPLACE AN IDLE LEAK CHECK BY A MOTORING TEST. YOU CANNOT DETECT POTENTIAL OIL LEAKS WITH A MOTORING TEST. IF YOU DO A MOTORING TEST INSTEAD OF AN IDLE LEAK CHECK, YOU CAN CAUSE AN ENGINE SHUTDOWN.

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: DO A CHECK OF THE EGT BEFORE YOU DO THE WET MOTORING CHECK. THE EGT MUST BE LESS THAN 250 DEG.C TO DO THE WET-MOTORING CHECK. IF THE EGT IS MORE THAN 250 DEG.C, THE WET-MOTORING CHECK WILL ABORT.

ZONE: 210
ZONE: 400

1. Reason for the Job
Wet-motoring is necessary for maintenance checks where you must turn the engine and have fuel flow without ignition:

Leak check of the fuel system
To prime the engine fuel system after maintenance.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
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
TASK 79-00-00-210-814-A	Visual Inspection of the Oil System (Fan Cowls and Thrust Reversers Opened)

3. Job Set-up
Subtask 71-00-00-869-371-A

A. Prepare for the Test
(1) 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).
(2) Make sure that the engine inlet and exhaust covers are removed. Make sure that these areas are clear of unwanted objects.
(3) Make a visual check of the temperature sensors, fan inlet and exhaust areas. If snow or ice has collected in the fan duct, make sure that the fan turns freely. Also, make sure that the engine inlet, inlet lip, fan, spinner and fan exhaust duct are clear of ice or snow. If the fan does not turn freely, you must melt the snow or ice with hot air before the engine operation.
(4) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, LPT and external surfaces of the cowls.
(5) Do a check of the oil quantity (Ref. AMM TASK 12-13-79-610-805).
(6) Do a check of the drain ports for fuel, oil and hydraulic leaks (Ref. AMM TASK 71-00-00-790-805).
(7) Make sure that the fuel drained from the engine does not cause a fire.

Subtask 71-00-00-941-142-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, and
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.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 71-00-00-010-194-A

C. Get Access

NOTE: It is only necessary to open the fan cowl door and the thrust reverser door when you do the leak check of the fuel system. For other maintenance tasks, you can do this procedure with the fan cowl door and the thrust reverser door closed.

(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

Subtask 71-00-00-040-108-A

D. Deactivation of the Thrust Reverser System for 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 maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 71-00-00-010-195-A

E. Open the thrust reverser doors to the 45-degree position (Ref. AMM TASK 78-36-00-010-806):
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 71-00-00-861-113-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 71-00-00-865-183-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 71-00-00-865-184-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 71-00-00-869-372-A

I. Continue to Prepare for the 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 High Pressure (HP) ground power unit or the Auxiliary Power Unit (APU) (Ref. AMM TASK 36-12-00-860-805) and (Ref. AMM TASK 36-12-00-860-806).
(2) Make sure that you obey your local fire-fighting regulations.
(3) On the lower ECAM DU:
(a) Get the HYDRAULIC page.
(b) Make sure that the pressure of the Green reservoir for engine 1 or/and the Yellow reservoir for engine 2 is correct.
(c) Make sure that the reservoir fluid level is correct.
(4) Make sure that the engine 1(2) pump is serviceable:
(a) On the HYD/FUEL panel 40VU, the OFF legend of the ENG 1(2) PUMP pushbutton switch must be off.

Subtask 71-00-00-710-256-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
Subtask 71-00-00-710-257-A

A. Wet-Motoring Check

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: DURING THE WET-MOTORING PROCEDURE, THE "ENGINE FAIL" ECAM WARNING MESSAGE CAN COME INTO VIEW. IF IT DOES, IGNORE IT.

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.

(1) Do this test:

ACTION	RESULT
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 engine 1(2) is in the idle stop position (zero on the graduated sector).
3.On ENG panel 115VU: Set the ENG/MODE/CRANK/NORM/IGN/START selector switch to CRANK.	On the lower ECAM Display Unit (DU): The ENGINE page comes into view. Make sure that the available air pressure is between 25 psi (2 bar) and 55 psi (4 bar). Make sure that the quantity of oil in the oil tank is correct.
4.On OVERHEAD CTL & IND panel 22VU: Push the ENG/MAN/START/1(2) pushbutton switch. NOTE: In cold weather conditions, important oil-pressure surges can occur. Obey the starter limits given below: Do not engage the starter when the core speed is above 63 percent. The permitted starter duty cycles are as follows: * Three motoring cycles one after the other. Each cycle has a duration of two minutes, and there is a rest period of 60 seconds between each cycle. At the end of this rest period, a 15-minute cooling period occurs before a new start or motoring cycle. * Three motoring cycles one after the other. Each cycle has a duration of five minutes, and there is a rest period of five minutes between each cycle. At the end of this rest period, a 15-minute cooling period occurs before a new start or motoring cycle.	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 does a motoring cycle, do a visual check for leaks at the fuel and oil system tubes and manifolds.
5.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: Fuel flow indication FF increases. On the lower ECAM DU: Make sure that the oil pressure indication is positive. Do not operate the engine for more than 15 seconds with the ENG/MASTER 1(2) control switch set to the ON position.
6.After a fuel mist is shown 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 you do a reset of the Electronic Engine Control (EEC). NOTE: After the reset of the EEC, the EEC will command the starter valve to open and the dry-motoring procedure is performed.
7.Continue the dry-motoring of the engine for 60 seconds.	This will dry the fuel that can be in the combustor.
8.After 60 seconds, on OVERHEAD CTL & IND panel 22VU: Release the ENG/MAN START 1(2) pushbutton switch.	The ON legend of this pushbutton switch goes off. On the lower ECAM DU: The symbol for the starter valve is in the closed position. The engine motoring stops and the engine coast-down starts.
9.On ENG panel 115VU: Set the ENG/MODE/CRANK/IGN/START selector switch to NORM.	On the lower ECAM DU: The ENGINE page goes out of view.
10.On HYD/FUEL panel 40VU: Release all the FUEL/PUMPS pushbutton switches.	The OFF legends of these pushbutton switches come on.

Subtask 71-00-00-280-051-A

B. During engine coast-down, while the components continue to run, listen for unusual noise from these components.

NOTE: Gear noise and seal rubs are normal noise.

Subtask 71-00-00-210-109-A

C. Make a check of the engine, fan frame and turbine for unusual roughness.
(1) Check the oil level and service as necessary Ref. AMM TASK 12-13-79-610-805
(a) If servicing is required, do servicing of the oil tank but fill the oil tank to the "MAX" mark minus 3 quarts.
(2) Make a check of the fuel-nozzle manifold-shrouds for leaks. No leaks are permitted.
(3) Fuel on the shrouds is an indication of a leak in the system.
(4) Make an inspection of the lubrication system lines, fittings and accessories for leaks (Ref. AMM TASK 79-00-00-210-814).

5. Close-up
Subtask 71-00-00-869-373-A

A. If, during the test, the ECAM warning message ENG FAIL came into view, reset the two Flight Warning Computers (FWCs). To do this, open, then close circuit breakers 2WW and 3WW.

Subtask 71-00-00-865-185-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 71-00-00-869-374-A

C. Put the aircraft back to its initial configuration.
(1) Stop the pneumatic supply to the aircraft.
(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 71-00-00-862-104-A

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

Subtask 71-00-00-410-181-A

E. 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 71-00-00-440-101-A

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

Subtask 71-00-00-410-182-A

G. 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 WARNING NOTICE(S).

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